Add --scale-down to manual

feh.1

@@ -137,6 +137,9 @@ Note that larger images will be zoomed out to fit
 but you can see them at 1:1 by clicking the zoom
 button.
 .TP 5
+.B -., --scale-down
+When not in fullscreen: Scale images to screen size if they are too big
+.TP 5
 .B -Z, --auto-zoom
 Zoom picture to screen size in fullscreen (affected by --stretch and
 --ignore-aspect).

src/options.c

@@ -891,7 +891,7 @@ show_usage(void)
 "                           RAM, it means run through and eliminate unloadable\n"
 "                           images first. Otherwise they will be removed as you\n"
 "                           flick through.\n"
-"     --scale-down          Automatically scale down images too big for the\n"
+" -., --scale-down          Automatically scale down images too big for the\n"
 "                           screen. Currently only works with -P\n"
 " -F, --full-screen         Make the window fullscreen\n"
 " -Z, --auto-zoom           Zoom picture to screen size in fullscreen mode,\n"