diff --git a/bin/History.txt b/bin/History.txt
index 8f83a222..dd91e375 100644
--- a/bin/History.txt
+++ b/bin/History.txt
@@ -11,7 +11,7 @@ Tom Charlesworth
 
 1.30.16.0 - 26 Nov 2023
 -----------------------
-- [Change #1258]  New command line: -mac-lc-card-dlgr to support the DLGR bug in the 'Apple IIe card Mac LC'.
+- [Change #1258]  New command line: -mac-lc-card-dlgr to support the DLGR display bug in the 'Apple IIe card for Mac LC'.
   - NB. This switch only has an effect when in either "Color (Composite Idealized)" or "RGB Card/Monitor" video modes.
 - [Bug #1197] Phasor: 6522's AY RESET always resets both attached AYs, regardless of Phasor mode or chip-select bits.
 
diff --git a/help/CommandLine.html b/help/CommandLine.html
index 7f1491fc..b277ce8d 100644
--- a/help/CommandLine.html
+++ b/help/CommandLine.html
@@ -185,6 +185,9 @@
 		-rgb-card-invert-bit7<br>
 		Force the RGB card to invert bit7 in MIX mode. Enables the correct rendering for Dragon Wars.<br>
 		Use in conjunction with the 'Color (RGB Card/Monitor)' video mode.<br><br>
+		-mac-lc-card-dlgr<br>
+		Support the DLGR display bug in the 'Apple IIe card for Mac LC'.<br>
+		NB. This switch only has an effect when in either "Color (Composite Idealized)" or "RGB Card/Monitor" video modes.<br><br>
 		-50hz<br>
 		Support 50Hz(PAL) video refresh rate and PAL 1.016MHz base CPU clock.<br><br>
 		-60hz<br>