diff --git a/doc/Guidebook.mn b/doc/Guidebook.mn
index d6594f328..fdaf540f7 100644
--- a/doc/Guidebook.mn
+++ b/doc/Guidebook.mn
@@ -3907,6 +3907,10 @@ Values are \(lqautodetect\(rq, \(lqdefault\(rq, or \(lqvga\(rq.
 Setting \(lqvga\(rq (or \(lqautodetect\(rq with vga hardware present)
 will cause the game to display tiles.
 Cannot be set with the \(oqO\(cq command.
+.lp video_height
+Set the VGA mode resolution height (MS-DOS only, with video:vga)
+.lp video_width
+Set the VGA mode resolution width (MS-DOS only, with video:vga)
 .lp videocolors
 Set the color palette for PC systems using NO_TERMS
 (default 4-2-6-1-5-3-15-12-10-14-9-13-11, (PC NetHack only).
diff --git a/doc/Guidebook.tex b/doc/Guidebook.tex
index 649b09d80..a7772a034 100644
--- a/doc/Guidebook.tex
+++ b/doc/Guidebook.tex
@@ -4342,6 +4342,12 @@ Setting {\it vga\/} (or {\it autodetect\/} with vga hardware present) will
 cause the game to display tiles.
 Cannot be set with the `{\tt O}' command.
 %.lp
+\item[\ib{video\verb+_+height}]
+Set the VGA mode resolution height (MS-DOS only, with video:vga)
+%.lp
+\item[\ib{video\verb+_+width}]
+Set the VGA mode resolution height (MS-DOS only, with video:vga)
+%.lp
 \item[\ib{videocolors}]
 \begin{sloppypar}
 Set the color palette for PC systems using NO\verb+_+TERMS
diff --git a/sys/share/NetHack.cnf b/sys/share/NetHack.cnf
index 58154bfce..3d29538a0 100644
--- a/sys/share/NetHack.cnf
+++ b/sys/share/NetHack.cnf
@@ -27,6 +27,10 @@ OPTIONS=rawio,BIOS,symset:IBMGraphics_2,roguesymset:RogueEpyx
 # To use VGA graphical tiles on an MS-DOS PC with VGA or better,uncomment 
 # this:
 #OPTIONS=video:autodetect
+# And to explicitly set the resolution:
+#OPTIONS=video_width:1024
+#OPTIONS=video_height:768
+
 
 # If your machine is NEC PC-9800, use:
 #OPTIONS=rawio,BIOS,video:default