diff --git a/src/osd/sdl/man/mame.6 b/src/osd/sdl/man/mame.6
index 736693cb023..1a4f1723bba 100644
--- a/src/osd/sdl/man/mame.6
+++ b/src/osd/sdl/man/mame.6
@@ -918,6 +918,10 @@ handling that makes it easier to register simultaneous button presses,
 but has the disadvantage of making controls less responsive. The
 default is OFF (\-nosteadykey).
 .TP
+.B \-[no]ui_active
+Enable MAME user interface on top of emulated keyboard (if present).
+Default is OFF (\-noui_active).
+.TP
 .B \-[no]offscreen_reload, \-[no]reload
 Controls whether or not MAME treats a second button input from a
 lightgun as a reload signal. In this case, MAME will report the gun's
@@ -958,6 +962,7 @@ Default is OFF (\-nojoystick_contradictory).
 .B \-coin_impulse \fItime
 Set coin impulse time. A negative value for \fItime\fR disables the impulse;
 set \fItime\fR to 0 to obey driver or give a positive value to set impulse time.
+.\"
 .\" +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 .\" SDL specific
 .\" +++++++++++++++++++++++++++++++++++++++++++++++++++++++
@@ -1050,6 +1055,7 @@ immediately at startup. The default is OFF (\-nodebug).
 .B \-debugscript \fIfilename
 Specifies a file that contains a list of debugger commands to execute
 immediately upon startup. The default is NULL (no commands).
+.\"
 .\" +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 .\" SDL specific
 .\" +++++++++++++++++++++++++++++++++++++++++++++++++++++++
@@ -1095,7 +1101,7 @@ to its built\-in UI font. On some platforms \fIfontname\fP can be a system
 font name instead of a BDF font file. The default is 'default' (use 
 the OSD\-determined default font).
 .TP
-.B \-ramsize, \-ram
+.B \-ramsize, \-ram \fIvalue
 Size of RAM (if supported by driver).
 .TP
 .B \-[no]confirm_quit
diff --git a/src/osd/sdl/man/mess.6 b/src/osd/sdl/man/mess.6
index 51da833767f..a3ddc12c3bc 100644
--- a/src/osd/sdl/man/mess.6
+++ b/src/osd/sdl/man/mess.6
@@ -928,6 +928,12 @@ handling that makes it easier to register simultaneous button presses,
 but has the disadvantage of making controls less responsive. The
 default is OFF (\-nosteadykey).
 .TP
+.B \-[no]ui_active
+Enable MESS user interface on top of emulated keyboard (if present).
+User interface may be toggled during execution by pressing the key
+defined with \-ui_modekey.
+Default is OFF (\-noui_active).
+.TP
 .B \-[no]offscreen_reload, \-[no]reload
 Controls whether or not MESS treats a second button input from a
 lightgun as a reload signal. In this case, MESS will report the gun's
@@ -1103,7 +1109,7 @@ to its built\-in UI font. On some platforms \fIfontname\fP can be a system
 font name instead of a BDF font file. The default is 'default' (use
 the OSD\-determined default font).
 .TP
-.B \-ramsize, \-ram
+.B \-ramsize, \-ram \fIvalue
 Size of RAM (if supported by driver).
 .TP
 .B \-[no]confirm_quit