diff --git a/eeshow/gui/common.h b/eeshow/gui/common.h
index cb86c73..8c1bf4b 100644
--- a/eeshow/gui/common.h
+++ b/eeshow/gui/common.h
@@ -113,17 +113,12 @@ void add_glabel_aoi(struct gui_sheet *sheet, const struct sch_obj *obj);
 
 /* sheet.c */
 
-bool sheet_click(void *user, int x, int y);
-bool sheet_hover_update(void *user, int x, int y);
-void sheet_key(void *user, int x, int y, int keyval);
-
 void go_to_sheet(struct gui_ctx *ctx, struct gui_sheet *sheet);
 void do_revision_overlays(struct gui_ctx *ctx);
 void sheet_setup(struct gui_ctx *ctx);
 
 /* history */
 
-void hide_history(struct gui_ctx *ctx);
 void show_history(struct gui_ctx *ctx, enum selecting sel);
 
 /* gui.c */
diff --git a/eeshow/gui/history.c b/eeshow/gui/history.c
index 441b849..506b4a8 100644
--- a/eeshow/gui/history.c
+++ b/eeshow/gui/history.c
@@ -26,7 +26,7 @@
 #include "gui/common.h"
 
 
-void hide_history(struct gui_ctx *ctx)
+static void hide_history(struct gui_ctx *ctx)
 {
 	input_pop();
 
@@ -217,6 +217,25 @@ void show_history(struct gui_ctx *ctx, enum selecting sel)
 /* ----- Input ------------------------------------------------------------- */
 
 
+static bool history_click(void *user, int x, int y)
+{
+	struct gui_ctx *ctx = user;
+
+	if (aoi_click(ctx->aois, x, y))
+		return 1;
+	hide_history(ctx);
+	return 1;
+}
+
+
+static bool history_hover_update(void *user, int x, int y)
+{
+	struct gui_ctx *ctx = user;
+
+	return aoi_hover(ctx->aois, x, y);
+}
+
+
 static void history_drag_move(void *user, int dx, int dy)
 {
 	struct gui_ctx *ctx = user;
@@ -226,15 +245,21 @@ static void history_drag_move(void *user, int dx, int dy)
 }
 
 
-/* @@@ under construction */
+static void history_key(void *user, int x, int y, int keyval)
+{
+	switch (keyval) {
+	case GDK_KEY_q:
+		gtk_main_quit();
+	}
+}
 
 
 static const struct input_ops history_input_ops = {
-	.click		= sheet_click,
-	.hover_begin	= sheet_hover_update,
-	.hover_update	= sheet_hover_update,
-	.hover_click	= sheet_click,
+	.click		= history_click,
+	.hover_begin	= history_hover_update,
+	.hover_update	= history_hover_update,
+	.hover_click	= history_click,
 	.drag_begin	= input_accept,
 	.drag_move	= history_drag_move,
-	.key		= sheet_key,
+	.key		= history_key,
 };
diff --git a/eeshow/gui/sheet.c b/eeshow/gui/sheet.c
index ca21cc0..f581cdc 100644
--- a/eeshow/gui/sheet.c
+++ b/eeshow/gui/sheet.c
@@ -308,7 +308,7 @@ static bool go_next_sheet(struct gui_ctx *ctx)
 /* ----- Input ------------------------------------------------------------- */
 
 
-bool sheet_click(void *user, int x, int y)
+static bool sheet_click(void *user, int x, int y)
 {
 	struct gui_ctx *ctx = user;
 	const struct gui_sheet *curr_sheet = ctx->curr_sheet;
@@ -322,15 +322,13 @@ bool sheet_click(void *user, int x, int y)
 	    ex + curr_sheet->xmin, ey + curr_sheet->ymin))
 		return 1;
 
-	if (ctx->showing_history)
-		hide_history(ctx);
 	overlay_remove_all(&ctx->pop_overlays);
 	redraw(ctx);
 	return 1;
 }
 
 
-bool sheet_hover_update(void *user, int x, int y)
+static bool sheet_hover_update(void *user, int x, int y)
 {
 	struct gui_ctx *ctx = user;
 	const struct gui_sheet *curr_sheet = ctx->curr_sheet;
@@ -375,7 +373,7 @@ static void sheet_scroll(void *user, int x, int y, int dy)
 }
 
 
-void sheet_key(void *user, int x, int y, int keyval)
+static void sheet_key(void *user, int x, int y, int keyval)
 {
 	struct gui_ctx *ctx = user;
 	struct gui_sheet *sheet = ctx->curr_sheet;