diff --git a/key-bindings.c b/key-bindings.c
index 2555b9fcb..d0460dc88 100644
--- a/key-bindings.c
+++ b/key-bindings.c
@@ -53,6 +53,7 @@
 	" '#{?#{m/r:(copy|view)-mode,#{pane_mode}},Go To Bottom,}' '>' {send -X history-bottom}" \
 	" ''" \
 	" '#{?#{==:#{pane_mode},copy-mode},#{?copy_line_numbers,Hide Line Numbers,Show Line Numbers},}' 'L' {send -X line-numbers-toggle}" \
+	" '#{?#{==:#{pane_mode},copy-mode},Edit,}' 'e' {if -F '#{selection_present}' {send -X open-selection} {send -X open-output}}" \
 	" '#{?#{==:#{pane_mode},copy-mode},#{?refresh_active,Refresh Off,Refresh On},}' 'r' {send -X refresh-toggle}" \
 	" ''" \
 	" '#{?#{&&:#{buffer_size},#{!:#{pane_in_mode}}},Paste #[underscore]#{=/9/...:buffer_sample},}' 'p' {paste-buffer}" \
@@ -575,6 +576,7 @@ key_bindings_init(void)
 		"bind -Tcopy-mode C-l { send -X recentre-top-bottom }",
 		"bind -Tcopy-mode M-l { send -X cursor-centre-horizontal }",
 		"bind -Tcopy-mode C-n { send -X cursor-down }",
+		"bind -Tcopy-mode C-o { send -X select-output }",
 		"bind -Tcopy-mode C-p { send -X cursor-up }",
 		"bind -Tcopy-mode C-r { command-prompt -P -T search -ip'(search up)' -I'#{pane_search_string}' { send -X search-backward-incremental -- '%%' } }",
 		"bind -Tcopy-mode C-s { command-prompt -P -T search -ip'(search down)' -I'#{pane_search_string}' { send -X search-forward-incremental -- '%%' } }",
@@ -592,6 +594,7 @@ key_bindings_init(void)
 		"bind -Tcopy-mode R { send -X rectangle-toggle }",
 		"bind -Tcopy-mode T { command-prompt -P -1p'(jump to backward)' { send -X jump-to-backward -- '%%' } }",
 		"bind -Tcopy-mode X { send -X set-mark }",
+		"bind -Tcopy-mode e { if -F '#{selection_present}' { send -X open-selection } { send -X open-output } }",
 		"bind -Tcopy-mode f { command-prompt -P -1p'(jump forward)' { send -X jump-forward -- '%%' } }",
 		"bind -Tcopy-mode g { command-prompt -P -p'(goto line)' { send -X goto-line -- '%%' } }",
 		"bind -Tcopy-mode n { send -X search-again }",
@@ -687,6 +690,8 @@ key_bindings_init(void)
 		"bind -Tcopy-mode-vi K { send -X scroll-up }",
 		"bind -Tcopy-mode-vi L { send -X bottom-line }",
 		"bind -Tcopy-mode-vi M { send -X middle-line }",
+		"bind -Tcopy-mode-vi M-e { if -F '#{selection_present}' { send -X open-selection } { send -X open-output } }",
+		"bind -Tcopy-mode-vi M-o { send -X select-output }",
 		"bind -Tcopy-mode-vi N { send -X search-reverse }",
 		"bind -Tcopy-mode-vi P { send -X toggle-position }",
 		"bind -Tcopy-mode-vi T { command-prompt -P -1p'(jump to backward)' { send -X jump-to-backward -- '%%' } }",
diff --git a/regress/output-commands.sh b/regress/output-commands.sh
new file mode 100755
index 000000000..5b67efb6a
--- /dev/null
+++ b/regress/output-commands.sh
@@ -0,0 +1,108 @@
+#!/bin/sh
+
+PATH=/bin:/usr/bin
+TERM=screen
+
+[ -z "$TEST_TMUX" ] && TEST_TMUX=$(readlink -f ../tmux)
+TMUX="$TEST_TMUX -L${TEST_SOCKET:-testO$$} -f/dev/null"
+OUT=/tmp/tmux-output-commands-$$
+EXPECTED=$(printf 'one\ntwo')
+
+cleanup()
+{
+	$TMUX kill-server 2>/dev/null
+	rm -f "$OUT"
+}
+trap cleanup EXIT HUP INT TERM
+
+$TMUX kill-server 2>/dev/null
+$TMUX new-session -d -x80 -y20 "sh -c 'printf \"\\033]133;A\\007p\\$ \\033]133;B\\007echo\\n\\033]133;C\\007one\\ntwo\\n\\033]133;D;0\\007separator\\n\\033]133;A\\007p\\$ \\033]133;B\\007broken\\n\\033]133;C\\007unfinished\"; exec sleep 100'" || exit 1
+sleep 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+
+$TMUX send-keys -X pipe-output "wc -c >$OUT" || exit 1
+sleep 1
+[ "$(cat "$OUT")" = 10 ] || exit 1
+
+$TMUX send-keys -X copy-pipe-output "wc -c >$OUT" output || exit 1
+sleep 1
+[ "$(cat "$OUT")" = 10 ] || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+
+$TMUX send-keys -X select-output || exit 1
+$TMUX send-keys -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = unfinished ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X search-backward separator || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = "$EXPECTED" ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX copy-mode || exit 1
+$TMUX send-keys -X search-backward one || exit 1
+$TMUX send-keys -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = "$EXPECTED" ] || exit 1
+$TMUX send-keys -X cancel || exit 1
+
+$TMUX new-window -d -n plain "printf 'alpha\\nbeta\\n'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :plain || exit 1
+$TMUX send-keys -t :plain.0 -X copy-output -a || exit 1
+all=$($TMUX show-buffer)
+case "$all" in
+*alpha*beta*) ;;
+*) exit 1 ;;
+esac
+$TMUX send-keys -t :plain.0 -X cancel || exit 1
+
+$TMUX set-buffer -b keep unchanged || exit 1
+$TMUX copy-mode -t :plain || exit 1
+$TMUX send-keys -t :plain.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer -b keep)" = unchanged ] || exit 1
+$TMUX send-keys -t :plain.0 -X cancel || exit 1
+
+$TMUX new-window -d -n empty "printf '\\033]133;A\\007p\\$ \\033]133;B\\007echo\\033]133;C\\007one\\n\\033]133;D;0\\007\\033]133;A\\007p\\$ \\033]133;B\\007true\\033]133;C\\033]133;D;0\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :empty || exit 1
+$TMUX send-keys -t :empty.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :empty.0 -X cancel || exit 1
+
+$TMUX new-window -d -n prompt "printf '\\033]133;A\\007p\\$ \\033]133;B\\007echo\\033]133;C\\007one\\n\\033]133;D;0\\007\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :prompt || exit 1
+$TMUX send-keys -t :prompt.0 -X copy-output || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :prompt.0 -X cancel || exit 1
+
+$TMUX copy-mode -t :prompt || exit 1
+$TMUX send-keys -t :prompt.0 -X -N 100 cursor-down || exit 1
+$TMUX send-keys -t :prompt.0 C-o || exit 1
+[ "$($TMUX display-message -p -t :prompt.0 '#{selection_present}')" = 1 ] || exit 1
+$TMUX send-keys -t :prompt.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :prompt.0 -X cancel || exit 1
+
+$TMUX new-window -d -n same "printf '\\033]133;A\\007p\\$ \\033]133;B\\007echo\\n\\033]133;C\\007one\\033]133;D;0\\007\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :same || exit 1
+$TMUX send-keys -t :same.0 -X search-backward one || exit 1
+$TMUX send-keys -t :same.0 -X select-output || exit 1
+$TMUX send-keys -t :same.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = one ] || exit 1
+$TMUX send-keys -t :same.0 -X cancel || exit 1
+
+$TMUX new-window -d -n clear "printf 'old1\\nold2\\nold3\\nold4\\nold5\\nold6\\n\\033]133;A\\007p\\$ \\033]133;B\\007echo 1; clear; ps\\n\\033]133;C\\0071\\n\\033[H\\033[2JPID TTY\\n1 pts/0\\n\\033]133;D;0\\007separator\\n\\033]133;A\\007p\\$ \\033]133;B\\007'; exec sleep 100" || exit 1
+sleep 1
+$TMUX copy-mode -t :clear || exit 1
+$TMUX send-keys -t :clear.0 C-o || exit 1
+$TMUX send-keys -t :clear.0 -X copy-selection || exit 1
+[ "$($TMUX show-buffer)" = "$(printf 'PID TTY\n1 pts/0')" ] || exit 1
+$TMUX send-keys -t :clear.0 -X cancel || exit 1
+
+exit 0
diff --git a/tmux.1 b/tmux.1
index 56790f9f0..8e10a34e6 100644
--- a/tmux.1
+++ b/tmux.1
@@ -2006,6 +2006,25 @@ Same as
 .Ic copy\-pipe
 but also exit copy mode.
 .It Xo
+.Ic copy\-pipe\-output
+.Op Fl aCP
+.Op Ar command
+.Op Ar prefix
+.Xc
+Copy the current OSC 133 command output, pipe it to
+.Ar command ,
+and clear the selection.
+.Ar prefix
+is used to name the new paste buffer.
+.It Xo
+.Ic copy\-output
+.Op Fl aCP
+.Op Ar prefix
+.Xc
+Copy the current OSC 133 command output and clear the selection.
+.Ar prefix
+is used to name the new paste buffer.
+.It Xo
 .Ic copy\-selection
 .Op Fl CP
 .Op Ar prefix
@@ -2224,6 +2243,32 @@ but treat all non-whitespace characters as part of a word.
 .Xc
 Switch at which end of the selection the cursor sits.
 .It Xo
+.Ic open\-output
+.Op Fl a
+.Op Ar command
+.Xc
+Open the current OSC 133 command output in an editor.
+If
+.Ar command
+is given, it is used as the editor command; otherwise, the
+.Ic editor
+option is used.
+.It Xo
+.Ic open\-selection
+.Op Ar command
+.Xc
+Open the current selection in an editor.
+If
+.Ar command
+is given, it is used as the editor command; otherwise, the
+.Ic editor
+option is used.
+In emacs mode,
+.Ql e ,
+and in vi mode,
+.Ql M\-e ,
+opens the selection if one is present, otherwise the command output.
+.It Xo
 .Ic page\-down
 (vi: C\-f)
 (emacs: PageDown)
@@ -2264,6 +2309,14 @@ Same as
 .Ic pipe
 but also exit copy mode.
 .It Xo
+.Ic pipe\-output
+.Op Fl a
+.Op Ar command
+.Xc
+Pipe the current OSC 133 command output to
+.Ar command
+and clear the selection.
+.It Xo
 .Ic previous\-matching\-bracket
 (emacs: M\-C\-b)
 .Xc
@@ -2453,6 +2506,15 @@ Search forward for the specified plain text.
 Repeat the last search in the reverse direction (forward becomes backward and
 backward becomes forward).
 .It Xo
+.Ic select\-output
+.Op Fl a
+.Xc
+Select the current OSC 133 command output.
+The default emacs binding is
+.Ql C\-o
+and the default vi binding is
+.Ql M\-o .
+.It Xo
 .Ic select\-line
 (vi: V)
 .Xc
@@ -2496,6 +2558,20 @@ Toggle the visibility of the position indicator in the top right.
 Move to the top line.
 .El
 .Pp
+The output commands use OSC 133 output text from the
+.Ql C
+marker up to its matching
+.Ql D
+marker.
+If there is no
+.Ql D
+marker, the output ends at the end of the copy-mode buffer.
+At the following prompt or below it, they use the most recent nonempty output.
+With
+.Fl a ,
+they use the entire copy-mode buffer instead.
+If no output range can be found, they do nothing.
+.Pp
 The search commands come in several varieties:
 .Ql search\-forward
 and
diff --git a/window-copy.c b/window-copy.c
index c5529a3ff..15d288be6 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -117,9 +117,20 @@ static int	window_copy_set_selection(struct window_mode_entry *, int, int);
 static int	window_copy_update_selection(struct window_mode_entry *, int,
 		    int);
 static void	window_copy_synchronize_cursor(struct window_mode_entry *, int);
+static int	window_copy_find_output_range(struct window_mode_entry *,
+		    u_int *, u_int *, u_int *, u_int *);
+static int	window_copy_find_previous_output_range(struct window_mode_entry *,
+		    u_int, u_int, u_int *, u_int *, u_int *, u_int *);
+static void	window_copy_output_end(struct screen *, u_int *, u_int *);
 static void    *window_copy_get_selection(struct window_mode_entry *, size_t *);
+static void    *window_copy_get_output(struct window_mode_entry *, size_t *,
+		    int);
+static void    *window_copy_get_grid_range(struct window_mode_entry *, u_int,
+		    u_int, u_int, u_int, size_t *);
 static void	window_copy_copy_buffer(struct window_mode_entry *,
 		    const char *, void *, size_t, int, int);
+static void	window_copy_pipe_buffer(struct session *, const char *, void *,
+		    size_t);
 static void	window_copy_pipe(struct window_mode_entry *,
 		    struct session *, const char *);
 static void	window_copy_copy_pipe(struct window_mode_entry *,
@@ -1587,6 +1598,80 @@ window_copy_cmd_copy_selection_and_cancel(struct window_copy_cmd_state *cs)
 	return (WINDOW_COPY_CMD_CANCEL);
 }
 
+static enum window_copy_cmd_action
+window_copy_cmd_select_output(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid_reader		 gr;
+	void				*buf;
+	size_t				 len;
+	u_int				 sx, sy, ex, ey, total;
+	int				 all = args_has(cs->wargs, 'a');
+
+	if (all) {
+		sx = sy = 0;
+		total = data->backing->grid->hsize + data->backing->grid->sy;
+		ey = total - 1;
+		ex = grid_get_line(data->backing->grid, ey)->cellused;
+	} else if (!window_copy_find_output_range(wme, &sx, &sy, &ex, &ey))
+		return (WINDOW_COPY_CMD_NOTHING);
+	buf = window_copy_get_output(wme, &len, all);
+	if (buf == NULL)
+		return (WINDOW_COPY_CMD_NOTHING);
+	free(buf);
+
+	window_copy_clear_selection(wme);
+	data->lineflag = LINE_SEL_NONE;
+	data->rectflag = 0;
+	data->selflag = SEL_CHAR;
+	window_copy_scroll_to(wme, sx, sy, 1);
+	window_copy_start_selection(wme);
+	if (options_get_number(wme->wp->window->options, "mode-keys") ==
+	    MODEKEY_VI) {
+		grid_reader_start(&gr, data->backing->grid, ex, ey);
+		grid_reader_cursor_left(&gr, 1);
+		grid_reader_get_cursor(&gr, &ex, &ey);
+	}
+	window_copy_scroll_to(wme, ex, ey, 1);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*prefix = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+	int				 set_paste = !args_has(cs->wargs, 'P');
+	int				 set_clip = !args_has(cs->wargs, 'C');
+
+	if (arg0 != NULL)
+		prefix = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL)
+			window_copy_copy_buffer(wme, prefix, buf, len, set_paste,
+			    set_clip);
+	}
+	free(prefix);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_copy_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
 static enum window_copy_cmd_action
 window_copy_cmd_cursor_down(struct window_copy_cmd_state *cs)
 {
@@ -2742,6 +2827,133 @@ window_copy_cmd_pipe_and_cancel(struct window_copy_cmd_state *cs)
 	return (WINDOW_COPY_CMD_CANCEL);
 }
 
+static enum window_copy_cmd_action
+window_copy_cmd_copy_pipe_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*command = NULL, *prefix = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	const char			*arg1 = args_string(cs->wargs, 1);
+	size_t				 len;
+	int				 set_paste = !args_has(cs->wargs, 'P');
+	int				 set_clip = !args_has(cs->wargs, 'C');
+
+	if (arg1 != NULL)
+		prefix = format_single(NULL, arg1, c, s, wl, wp);
+	if (s != NULL && arg0 != NULL && *arg0 != '\0')
+		command = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL) {
+			window_copy_pipe_buffer(s, command, buf, len);
+			window_copy_copy_buffer(wme, prefix, buf, len, set_paste,
+			    set_clip);
+		}
+	}
+	free(command);
+	free(prefix);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_copy_pipe_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_copy_pipe_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_pipe_output_no_clear(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct client			*c = cs->c;
+	struct session			*s = cs->s;
+	struct winlink			*wl = cs->wl;
+	struct window_pane		*wp = wme->wp;
+	void				*buf;
+	char				*command = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (s != NULL && arg0 != NULL && *arg0 != '\0')
+		command = format_single(NULL, arg0, c, s, wl, wp);
+	if (s != NULL) {
+		buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+		if (buf != NULL) {
+			window_copy_pipe_buffer(s, command, buf, len);
+			free(buf);
+		}
+	}
+	free(command);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_pipe_output(struct window_copy_cmd_state *cs)
+{
+	window_copy_cmd_pipe_output_no_clear(cs);
+	window_copy_clear_selection(cs->wme);
+	return (WINDOW_COPY_CMD_REDRAW);
+}
+
+static void
+window_copy_open_done(char *buf, __unused size_t len, __unused void *arg)
+{
+	free(buf);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_open_selection(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	struct window_copy_mode_data	*data = wme->data;
+	void				*buf;
+	char				*editor = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (cs->c == NULL ||
+	    (data->screen.sel == NULL && data->lineflag == LINE_SEL_NONE))
+		return (WINDOW_COPY_CMD_NOTHING);
+	if (arg0 != NULL && *arg0 != '\0')
+		editor = format_single(NULL, arg0, cs->c, cs->s, cs->wl, wme->wp);
+	buf = window_copy_get_selection(wme, &len);
+	if (buf != NULL) {
+		spawn_editor(cs->c, buf, len, editor, window_copy_open_done, NULL);
+		free(buf);
+	}
+	free(editor);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
+static enum window_copy_cmd_action
+window_copy_cmd_open_output(struct window_copy_cmd_state *cs)
+{
+	struct window_mode_entry	*wme = cs->wme;
+	void				*buf;
+	char				*editor = NULL;
+	const char			*arg0 = args_string(cs->wargs, 0);
+	size_t				 len;
+
+	if (cs->c == NULL)
+		return (WINDOW_COPY_CMD_NOTHING);
+	if (arg0 != NULL && *arg0 != '\0')
+		editor = format_single(NULL, arg0, cs->c, cs->s, cs->wl, wme->wp);
+	buf = window_copy_get_output(wme, &len, args_has(cs->wargs, 'a'));
+	if (buf != NULL) {
+		spawn_editor(cs->c, buf, len, editor, window_copy_open_done, NULL);
+		free(buf);
+	}
+	free(editor);
+	return (WINDOW_COPY_CMD_NOTHING);
+}
+
 static enum window_copy_cmd_action
 window_copy_cmd_goto_line(struct window_copy_cmd_state *cs)
 {
@@ -3404,6 +3616,18 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_copy_pipe_and_cancel
 	},
+	{ .command = "copy-pipe-output",
+	  .args = { "aCP", 0, 2, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_copy_pipe_output
+	},
+	{ .command = "copy-output",
+	  .args = { "aCP", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_copy_output
+	},
 	{ .command = "copy-selection-no-clear",
 	  .args = { "CP", 0, 1, NULL },
 	  .flags = 0,
@@ -3626,6 +3850,18 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_EMACS_ONLY,
 	  .f = window_copy_cmd_other_end
 	},
+	{ .command = "open-output",
+	  .args = { "a", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_NEVER,
+	  .f = window_copy_cmd_open_output
+	},
+	{ .command = "open-selection",
+	  .args = { "", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_NEVER,
+	  .f = window_copy_cmd_open_selection
+	},
 	{ .command = "page-down",
 	  .args = { "", 0, 0, NULL },
 	  .flags = WINDOW_COPY_CMD_FLAG_READONLY,
@@ -3662,6 +3898,12 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_pipe_and_cancel
 	},
+	{ .command = "pipe-output",
+	  .args = { "a", 0, 1, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_pipe_output
+	},
 	{ .command = "previous-matching-bracket",
 	  .args = { "", 0, 0, NULL },
 	  .flags = WINDOW_COPY_CMD_FLAG_READONLY,
@@ -3839,6 +4081,12 @@ static const struct {
 	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
 	  .f = window_copy_cmd_search_reverse
 	},
+	{ .command = "select-output",
+	  .args = { "a", 0, 0, NULL },
+	  .flags = 0,
+	  .clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
+	  .f = window_copy_cmd_select_output
+	},
 	{ .command = "select-line",
 	  .args = { "", 0, 0, NULL },
 	  .flags = 0,
@@ -5970,6 +6218,185 @@ window_copy_set_selection(struct window_mode_entry *wme, int may_redraw,
 	return (1);
 }
 
+/* Find the output range for the command at the cursor. */
+static int
+window_copy_find_output_range(struct window_mode_entry *wme, u_int *sx,
+    u_int *sy, u_int *ex, u_int *ey)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	struct grid_line		*gl;
+	u_int				 cursor_x, cursor_y, prompt_x = 0;
+	u_int				 prompt_y = UINT_MAX, y, total;
+	int				 found_start = 0, found_end = 0;
+
+	cursor_x = data->cx;
+	cursor_y = screen_hsize(data->backing) + data->cy - data->oy;
+	log_debug("%s: cursor at %u,%u", __func__, cursor_x, cursor_y);
+
+	total = gd->hsize + gd->sy;
+	for (y = 0; y < total; y++) {
+		gl = grid_get_line(gd, y);
+		if (~gl->flags & GRID_LINE_START_PROMPT)
+			continue;
+		if (y > cursor_y ||
+		    (y == cursor_y && gl->osc133_data.prompt_col > cursor_x))
+			break;
+		prompt_y = y;
+		prompt_x = gl->osc133_data.prompt_col;
+	}
+	if (prompt_y == UINT_MAX) {
+		log_debug("%s: no osc133 prompt before cursor", __func__);
+		return (0);
+	}
+	log_debug("%s: prompt at %u,%u", __func__, prompt_x, prompt_y);
+
+	for (y = prompt_y; y < total; y++) {
+		gl = grid_get_line(gd, y);
+		/* An output may end on the next prompt's line. */
+		if (found_start && gl->flags & GRID_LINE_END_OUTPUT &&
+		    (y != prompt_y || gl->osc133_data.out_end_col >= prompt_x)) {
+			*ex = gl->osc133_data.out_end_col;
+			*ey = y;
+			found_end = 1;
+			break;
+		}
+		if (y != prompt_y && gl->flags & GRID_LINE_START_PROMPT)
+			break;
+		if (gl->flags & GRID_LINE_START_OUTPUT &&
+		    (y != prompt_y || gl->osc133_data.out_start_col >= prompt_x)) {
+			*sx = gl->osc133_data.out_start_col;
+			*sy = y;
+			found_start = 1;
+		}
+	}
+	if (!found_start) {
+		log_debug("%s: no output after prompt", __func__);
+		return (window_copy_find_previous_output_range(wme, cursor_x,
+		    cursor_y, sx, sy, ex, ey));
+	}
+	if (!found_end) {
+		if (y != total) {
+			log_debug("%s: output interrupted by next prompt", __func__);
+			return (0);
+		}
+		window_copy_output_end(data->backing, ex, ey);
+	}
+	log_debug("%s: output from %u,%u to %u,%u", __func__, *sx, *sy,
+	    *ex, *ey);
+	return (1);
+}
+
+/* Find the most recent complete output at or before a position. */
+static int
+window_copy_find_previous_output_range(struct window_mode_entry *wme,
+    u_int cursor_x, u_int cursor_y, u_int *sx, u_int *sy, u_int *ex,
+    u_int *ey)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	struct grid_line		*gl;
+	void				*buf;
+	u_int				 start_x, start_y, end_x, end_y;
+	u_int				 y, total;
+	size_t				 len;
+	int				 found = 0, have_prompt = 0;
+	int				 pending = 0;
+
+	total = gd->hsize + gd->sy;
+	for (y = 0; y < total && y <= cursor_y; y++) {
+		gl = grid_get_line(gd, y);
+		if (gl->flags & GRID_LINE_START_OUTPUT &&
+		    (y != cursor_y || gl->osc133_data.out_start_col <= cursor_x)) {
+			start_x = gl->osc133_data.out_start_col;
+			start_y = y;
+			pending = 1;
+		}
+		/* The output may have cleared its C marker from the screen. */
+		if (!pending && !have_prompt &&
+		    gl->flags & GRID_LINE_END_OUTPUT &&
+		    (~gl->flags & GRID_LINE_START_PROMPT ||
+		    gl->osc133_data.out_end_col <= gl->osc133_data.prompt_col)) {
+			start_x = start_y = 0;
+			pending = 1;
+		}
+		if (pending && gl->flags & GRID_LINE_END_OUTPUT &&
+		    (y != cursor_y || gl->osc133_data.out_end_col <= cursor_x)) {
+			end_x = gl->osc133_data.out_end_col;
+			end_y = y;
+			buf = window_copy_get_grid_range(wme, start_x, start_y,
+			    end_x, end_y, &len);
+			if (buf != NULL) {
+				free(buf);
+				*sx = start_x;
+				*sy = start_y;
+				*ex = end_x;
+				*ey = end_y;
+				found = 1;
+			}
+			pending = 0;
+		}
+		if (gl->flags & GRID_LINE_START_PROMPT) {
+			pending = 0;
+			have_prompt = 1;
+		}
+	}
+	return (found);
+}
+
+static void
+window_copy_output_end(struct screen *s, u_int *x, u_int *y)
+{
+	*x = s->cx;
+	*y = screen_hsize(s) + s->cy;
+}
+
+static void *
+window_copy_get_output(struct window_mode_entry *wme, size_t *len, int all)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	u_int				 sx, sy, ex, ey, total;
+
+	total = gd->hsize + gd->sy;
+	if (all) {
+		sx = sy = 0;
+		ey = total - 1;
+		ex = grid_get_line(gd, ey)->cellused;
+	} else if (!window_copy_find_output_range(wme, &sx, &sy, &ex, &ey)) {
+		*len = 0;
+		return (NULL);
+	}
+	return (window_copy_get_grid_range(wme, sx, sy, ex, ey, len));
+}
+
+static void *
+window_copy_get_grid_range(struct window_mode_entry *wme, u_int sx, u_int sy,
+    u_int ex, u_int ey, size_t *len)
+{
+	struct window_copy_mode_data	*data = wme->data;
+	struct grid			*gd = data->backing->grid;
+	char				*buf;
+	size_t				 off;
+	u_int				 i;
+
+	buf = xmalloc(1);
+	off = 0;
+	for (i = sy; i <= ey; i++) {
+		window_copy_copy_line(wme, &buf, &off, i, i == sy ? sx : 0,
+		    i == ey ? ex : gd->sx);
+	}
+	if (off != 0 && buf[off - 1] == '\n')
+		off--;
+	if (off == 0) {
+		free(buf);
+		*len = 0;
+		return (NULL);
+	}
+	*len = off;
+	return (buf);
+}
+
 static void *
 window_copy_get_selection(struct window_mode_entry *wme, size_t *len)
 {
@@ -6102,8 +6529,7 @@ window_copy_copy_buffer(struct window_mode_entry *wme, const char *prefix,
 
 	if (set_clip &&
 	    options_get_number(global_options, "set-clipboard") != 0) {
-		if (window_copy_line_numbers_active(wme) &&
-		    (wp->flags & PANE_REDRAW)) {
+		if (wp->flags & PANE_REDRAW) {
 			/* Clear PANE_REDRAW so clipboard write not skipped. */
 			redraw = PANE_REDRAW;
 			wp->flags &= ~PANE_REDRAW;
@@ -6126,18 +6552,28 @@ window_copy_pipe_run(struct window_mode_entry *wme, struct session *s,
     const char *cmd, size_t *len)
 {
 	void		*buf;
-	struct job	*job;
 
 	buf = window_copy_get_selection(wme, len);
+	window_copy_pipe_buffer(s, cmd, buf, *len);
+	return (buf);
+}
+
+static void
+window_copy_pipe_buffer(struct session *s, const char *cmd, void *buf,
+    size_t len)
+{
+	struct job	*job;
+
+	if (buf == NULL)
+		return;
 	if (cmd == NULL || *cmd == '\0')
 		cmd = options_get_string(global_options, "copy-command");
 	if (cmd != NULL && *cmd != '\0') {
 		job = job_run(cmd, 0, NULL, NULL, s, NULL, NULL, NULL, NULL,
 		    NULL, JOB_NOWAIT, -1, -1);
 		if (job != NULL)
-			bufferevent_write(job_get_event(job), buf, *len);
+			bufferevent_write(job_get_event(job), buf, len);
 	}
-	return (buf);
 }
 
 static void