diff --git a/screen-redraw.c b/screen-redraw.c
index 522fd14d..4301d823 100644
--- a/screen-redraw.c
+++ b/screen-redraw.c
@@ -704,7 +704,7 @@ screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
 			/* Left not visible. */
 			l = ctx->ox - xoff;
 			x = 0;
-			width = size - i;
+			width = size - l;
 		} else {
 			/* Right not visible. */
 			l = 0;
@@ -712,7 +712,8 @@ screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
 			width = size - x;
 		}
 
-		r = screen_redraw_get_visible_ranges(wp, x, yoff, width, NULL);
+		r = tty_check_overlay_range(tty, x, yoff, width);
+		r = screen_redraw_get_visible_ranges(wp, x, yoff, width, r);
 		if (ctx->statustop)
 			yoff += ctx->statuslines;
 		for (i = 0; i < r->used; i++) {
@@ -1275,15 +1276,40 @@ screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 	struct screen		*s = wp->screen;
 	struct colour_palette	*palette = &wp->palette;
 	struct grid_cell	 defaults;
-	u_int			 i, j, woy, wx, wy, py, width;
+	u_int			 j, k, woy, wx, wy, py, width;
 	struct visible_ranges	*r;
 	struct visible_range	*ri;
 
+	/* There are 3 coordinate spaces:
+	 * window: (0 to w->sx-1, 0 to w->sy-1)
+	 * tty: (0 to tty->sx-1, 0 to tty->sy-1)
+	 * pane: (0 to wp->sx-1, 0 to wp->sy-1)
+	 *
+	 * Transformations:
+	 * window <-> tty (x-axis):
+	 *   window_x = tty_x + ctx->ox
+	 *   tty_x = window_x - ctx->ox
+	 *
+	 * window <-> tty (y-axis):
+	 *   woy = (ctx->statustop) ? ctx->statuslines : 0
+	 *   window_y = tty_y + ctx->oy - woy
+	 *   tty_y = woy + window_y - ctx->oy
+	 *
+	 * window <-> pane (x-axis):
+	 *   window_x = pane_x + wp->xoff
+	 *   pane_x = window_x - wp->xoff
+	 *
+	 * window <-> pane (y-axis):
+	 *   window_y = pane_y + wp->yoff
+	 *   pane_y = window_y - wp->yoff
+	 */
+
 	if (wp->base.mode & MODE_SYNC)
 		screen_write_stop_sync(wp);
 
 	log_debug("%s: %s @%u %%%u", __func__, c->name, w->id, wp->id);
 
+	/* Check if pane completely not visible. */
 	if (wp->xoff + (int)wp->sx <= ctx->ox ||
 	    wp->xoff >= (int)ctx->ox + (int)ctx->sx)
 		return;
@@ -1305,37 +1331,36 @@ screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
 		if (wp->xoff >= (int)ctx->ox &&
 		    wp->xoff + (int)wp->sx <= (int)ctx->ox + (int)ctx->sx) {
 			/* All visible. */
-			i = 0;
 			wx = (u_int)(wp->xoff - (int)ctx->ox);
 			width = wp->sx;
 		} else if (wp->xoff < (int)ctx->ox &&
 		    wp->xoff + (int)wp->sx > (int)ctx->ox + (int)ctx->sx) {
 			/* Both left and right not visible. */
-			i = ctx->ox;
 			wx = 0;
 			width = ctx->sx;
 		} else if (wp->xoff < (int)ctx->ox) {
 			/* Left not visible. */
-			i = (u_int)((int)ctx->ox - wp->xoff);
 			wx = 0;
-			width = wp->sx - i;
+			width = wp->sx - ((u_int)((int)ctx->ox - wp->xoff));
 		} else {
 			/* Right not visible. */
-			i = 0;
 			wx = (u_int)(wp->xoff - (int)ctx->ox);
 			width = ctx->sx - wx;
 		}
-		log_debug("%s: %s %%%u line %u,%u at %u,%u, width %u",
-		    __func__, c->name, wp->id, i, j, wx, wy, width);
 
 		/* Get visible ranges of line before we draw it. */
-		r = screen_redraw_get_visible_ranges(wp, wx, wy, width, NULL);
+		r = tty_check_overlay_range(tty, wx, wy, width);
+		r = screen_redraw_get_visible_ranges(wp, wx, wy, width, r);
 		tty_default_colours(&defaults, wp);
-		for (i = 0; i < r->used; i++) {
-			ri = &r->ranges[i];
+		for (k = 0; k < r->used; k++) {
+			ri = &r->ranges[k];
 			if (ri->nx == 0)
 				continue;
-			tty_draw_line(tty, s, ri->px - wp->xoff, j, ri->nx,
+			log_debug("%s: %s %%%u range pane (%u,%u) width %u, tty (%u,%u) width %u",
+			    __func__, c->name, wp->id,
+			    ri->px + (int)ctx->ox - wp->xoff, j, ri->nx,
+			    ri->px, py, ri->nx);
+			tty_draw_line(tty, s, ri->px + (int)ctx->ox - wp->xoff, j, ri->nx,
 			    ri->px, py, &defaults, palette);
 		}
 	}
@@ -1496,13 +1521,13 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 	}
 
 	for (j = jmin; j < jmax; j++) {
-		wy = sb_y + j;	   /* window y coordinate */
-		py = sb_tty_y + j;/* tty y coordinate */
+		wy = sb_y + j; /* window y coordinate */
+		py = sb_tty_y + j; /* tty y coordinate */
 		r = tty_check_overlay_range(tty, sb_x, wy, imax);
 		r = screen_redraw_get_visible_ranges(wp, sb_x, wy, imax, r);
 		for (i = imin; i < imax; i++) {
 			px = sb_x + ox + i; /* tty x coordinate */
-			wx = sb_x + i;	    /* window x coordinate */
+			wx = sb_x + i; /* window x coordinate */
 			if (wx < xoff - (int)sb_w - (int)sb_pad ||
 			    px >= sx || px < 0 ||
 			    wy < yoff - 1 ||
diff --git a/tty-draw.c b/tty-draw.c
index 865fff60..24d8b711 100644
--- a/tty-draw.c
+++ b/tty-draw.c
@@ -46,10 +46,6 @@ static void
 tty_draw_line_clear(struct tty *tty, u_int px, u_int py, u_int nx,
     const struct grid_cell *defaults, u_int bg, int wrapped)
 {
-	struct visible_ranges	*r;
-	struct visible_range	*rr;
-	u_int			 i;
-
 	/* Nothing to clear. */
 	if (nx == 0)
 		return;
@@ -82,20 +78,14 @@ tty_draw_line_clear(struct tty *tty, u_int px, u_int py, u_int nx,
 	}
 
         /* Couldn't use an escape sequence, use spaces. */
-	r = tty_check_overlay_range(tty, px, py, nx);
-	for (i = 0; i < r->used; i++) {
-		rr = &r->ranges[i];
-		if (rr->nx != 0) {
-			if (rr->px != 0 || !wrapped)
-				tty_cursor(tty, rr->px, py);
-			if (rr->nx == 1)
-				tty_putc(tty, ' ');
-			else if (rr->nx == 2)
-				tty_putn(tty, "  ", 2, 2);
-			else
-				tty_repeat_space(tty, rr->nx);
-		}
-	}
+	if (px != 0 || !wrapped)
+		tty_cursor(tty, px, py);
+	if (nx == 1)
+		tty_putc(tty, ' ');
+	else if (nx == 2)
+		tty_putn(tty, "  ", 2, 2);
+	else
+		tty_repeat_space(tty, nx);
 }
 
 /* Draw a line from screen to tty. */
diff --git a/tty.c b/tty.c
index 65c629c3..9d3ea5fb 100644
--- a/tty.c
+++ b/tty.c
@@ -1306,9 +1306,7 @@ tty_clear_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
 {
 	struct client		*c = tty->client;
 	const struct grid_cell	*defaults = &ctx->defaults;
-	struct visible_ranges	*r;
-	struct visible_range	*ri;
-	u_int			 i, yy, oy = 0;
+	u_int			 yy;
 	char			 tmp[64];
 
 	log_debug("%s: %s, %u,%u at %u,%u", __func__, c->name, nx, ny, px, py);
@@ -1373,17 +1371,8 @@ tty_clear_area(struct tty *tty, const struct tty_ctx *ctx, u_int py,
 	}
 
 	/* Couldn't use an escape sequence, loop over the lines. */
-	if (c->session->statusat == 0)
-               oy = c->session->statuslines;
-	for (yy = py; yy < py + ny; yy++) {
-		r = tty_check_overlay_range(tty, px, yy - oy, nx);
-		for (i = 0; i < r->used; i++) {
-			ri = &r->ranges[i];
-			if (ri->nx == 0)
-				continue;
-			tty_clear_line(tty, defaults, yy, ri->px, ri->nx, bg);
-		}
-	}
+	for (yy = py; yy < py + ny; yy++)
+		tty_clear_line(tty, defaults, yy, px, nx, bg);
 }
 
 /* Clear an area in a pane. */