diff --git a/help/Troubleshooting.html b/help/Troubleshooting.html
index 307844c4..d034e00d 100644
--- a/help/Troubleshooting.html
+++ b/help/Troubleshooting.html
@@ -58,5 +58,15 @@
Renegade: switches to 160x192 mode at the title screen and then B&W (at the title screen) after game play.
Apple's AppleColor card or Video7's RGB-SL7 card: corruption for titles/demos that accidentally switch to foreground/background hi-res mode, eg. French Touch DIGIDREAM demo.
+
+ Can't switch to 2x windowed mode:
+
+ - If the resolution isn't high enough to support 2x windowed mode, then AppleWin will refuse to switch.
+ - For different versions of Windows this is slightly different:
+
+ - Windows 7 requires: 1181 x 808
+ - Windows 10 (1909) requires: 1181 x 818
+
+