--- dxxorig/mtpaint-3.20.orig/src/mainwindow.c 
+++ mtpaint-3.20/src/mainwindow.c 
@@ -114,6 +114,8 @@
 int files_passed, file_arg_start, drag_index_vals[2], cursor_corner;
 char **global_argv;
 
+int fullscreen;
+
 GdkGC *dash_gc;
 
 
@@ -816,10 +818,13 @@
 
 static key_action main_keys[] = {
 	{"QUIT",	ACT_QUIT, GDK_q, 0, 0},
+	{"TO_FULLSCR",	ACT_FULLSCR, GDK_F6, _CS, 0},
 	{"ZOOM_IN",	ACT_ZOOM_IN, GDK_plus, _CS, 0},
 	{"",		ACT_ZOOM_IN, GDK_KP_Add, _CS, 0},
+	{"",		ACT_ZOOM_IN, GDK_F7, _CS, 0},
 	{"ZOOM_OUT",	ACT_ZOOM_OUT, GDK_minus, _CS, 0},
 	{"",		ACT_ZOOM_OUT, GDK_KP_Subtract, _CS, 0},
+	{"",		ACT_ZOOM_OUT, GDK_F8, _CS, 0},
 	{"ZOOM_01",	ACT_ZOOM_01, GDK_KP_1, _CS, 0},
 	{"",		ACT_ZOOM_01, GDK_1, _CS, 0},
 	{"ZOOM_025",	ACT_ZOOM_025, GDK_KP_2, _CS, 0},
@@ -931,8 +936,10 @@
 	{"",		ACT_TO_MASK, GDK_4, _CS, _S},
 	{"VWZOOM_IN",	ACT_VWZOOM_IN, GDK_plus, _CS, _S},
 	{"",		ACT_VWZOOM_IN, GDK_KP_Add, _CS, _S},
+	{"",		ACT_VWZOOM_IN, GDK_F7, _CS, _S},
 	{"VWZOOM_OUT",	ACT_VWZOOM_OUT, GDK_minus, _CS, _S},
 	{"",		ACT_VWZOOM_OUT, GDK_KP_Subtract, _CS, _S},
+	{"",		ACT_VWZOOM_OUT, GDK_F8, _CS, _S},
 	{NULL,		0, 0, 0, 0}
 };
 
@@ -1010,6 +1017,15 @@
 
 	switch (action)
 	{
+	case ACT_FULLSCR:
+		if (fullscreen == TRUE) {
+		    gtk_window_unfullscreen(GTK_WINDOW(main_window));
+		    fullscreen = FALSE;
+		} else {
+		    gtk_window_fullscreen(GTK_WINDOW(main_window));
+		    fullscreen = TRUE;
+		}
+		return (TRUE);
 	case ACT_SEL_LEFT: change = 1;
 	case ACT_SEL_2LEFT:
 		move_mouse(-change, 0, 0);
@@ -3917,6 +3933,11 @@
 ///	MAIN WINDOW
 
 	main_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+	
+	fullscreen = TRUE;
+	
+	gtk_window_fullscreen(GTK_WINDOW(main_window));
+	
 	gtk_widget_set_usize(main_window, 100, 100);		// Set minimum width/height
 	win_restore_pos(main_window, "window", 0, 0, 630, 400);
 	gtk_window_set_title (GTK_WINDOW (main_window), VERSION );

--- dxxorig/mtpaint-3.20.orig/src/mainwindow.h 
+++ mtpaint-3.20/src/mainwindow.h 
@@ -87,6 +87,7 @@
 #define ACT_TO_MASK	65
 #define ACT_VWZOOM_IN	66
 #define ACT_VWZOOM_OUT	67
+#define ACT_FULLSCR	68
 
 int wtf_pressed(GdkEventKey *event);