diff --unified --recursive --text fvwm-2.6.9/doc/commands/MenuStyle.xml fvwm-patched/doc/commands/MenuStyle.xml
--- fvwm-2.6.9/doc/commands/MenuStyle.xml	2016-10-15 08:51:45.000000000 -0600
+++ fvwm-patched/doc/commands/MenuStyle.xml	2020-08-21 15:51:37.721036428 -0600
@@ -58,7 +58,7 @@
 PopupOffset,
 TitleWarp / !TitleWarp,
 TitleUnderlines0 / TitleUnderlines1 / TitleUnderlines2,
-SeparatorsLong / SeparatorsShort,
+SeparatorsLong / SeparatorsShort / FlatSeparators,
 TrianglesSolid / TrianglesRelief,
 PopupImmediately / PopupDelayed,
 PopdownImmediately / PopdownDelayed,
@@ -436,6 +436,11 @@
 few pixels to the edges of the menu.</para>
 
 <para>
+<fvwmopt cmd="MenuStyle" opt="FlatSeparators"/>
+changes the separators so that they are a single pixel thick and
+colored the same as the text.</para>
+
+<para>
 <fvwmopt cmd="MenuStyle" opt="TrianglesSolid"/> and
 <fvwmopt cmd="MenuStyle" opt="TrianglesRelief"/>
 affect how the small triangles for sub menus is drawn.  Solid
diff --unified --recursive --text fvwm-2.6.9/fvwm/menuitem.c fvwm-patched/fvwm/menuitem.c
--- fvwm-2.6.9/fvwm/menuitem.c	2018-05-26 05:35:26.000000000 -0600
+++ fvwm-patched/fvwm/menuitem.c	2020-08-21 15:51:37.721036428 -0600
@@ -81,10 +81,14 @@
  *
  */
 static void draw_separator(
-	Window w, GC TopGC, GC BottomGC, int x1, int y, int x2)
+	Window w, GC TopGC, GC BottomGC, GC ForeGC, int x1, int y, int x2,
+	Bool do_flat_separators)
 {
 	XDrawLine(dpy, w, TopGC   , x1,   y,   x2,   y);
-	XDrawLine(dpy, w, BottomGC, x1-1, y+1, x2+1, y+1);
+	if (!do_flat_separators)
+	{
+			XDrawLine(dpy, w, BottomGC, x1-1, y+1, x2+1, y+1);
+	}
 
 	return;
 }
@@ -380,6 +384,7 @@
 	/*Pixel fg, fgsh;*/
 	int relief_thickness = ST_RELIEF_THICKNESS(ms);
 	Bool is_item_selected;
+	Bool do_flat_separators;
 	Bool item_cleared = False;
 	Bool xft_clear = False;
 	Bool empty_inter = False;
@@ -598,6 +603,8 @@
 	 * Draw the item itself.
 	 */
 
+	do_flat_separators = ST_DO_FLAT_SEPARATOR(ms);
+	
 	/* Calculate the separator offsets. */
 	if (ST_HAS_LONG_SEPARATORS(ms))
 	{
@@ -618,9 +625,9 @@
 		{
 			/* It's a separator. */
 			draw_separator(
-				mpip->w, gcs.shadow_gc, gcs.hilight_gc, sx1,
-				y_offset + y_height - MENU_SEPARATOR_HEIGHT,
-				sx2);
+				mpip->w, gcs.shadow_gc, gcs.hilight_gc, gcs.fore_gc,
+				sx1, y_offset + y_height - MENU_SEPARATOR_HEIGHT,
+				sx2, do_flat_separators);
 			/* Nothing else to do. */
 		}
 		return;
@@ -660,8 +667,8 @@
 			if (sx1 < sx2)
 			{
 				draw_separator(
-					mpip->w, gcs.shadow_gc, gcs.hilight_gc,
-					sx1, y, sx2);
+					mpip->w, gcs.shadow_gc, gcs.hilight_gc, gcs.fore_gc,
+					sx1, y, sx2, do_flat_separators);
 			}
 		}
 		/* Underline the title. */
@@ -674,8 +681,8 @@
 			{
 				y = y_offset + y_height - MENU_SEPARATOR_HEIGHT;
 				draw_separator(
-					mpip->w, gcs.shadow_gc, gcs.hilight_gc,
-					sx1, y, sx2);
+					mpip->w, gcs.shadow_gc, gcs.hilight_gc, gcs.fore_gc,
+					sx1, y, sx2, do_flat_separators);
 			}
 			break;
 		default:
Only in fvwm-patched/fvwm: menuitem.c.orig
diff --unified --recursive --text fvwm-2.6.9/fvwm/menus.c fvwm-patched/fvwm/menus.c
--- fvwm-2.6.9/fvwm/menus.c	2020-08-21 15:25:59.047514850 -0600
+++ fvwm-patched/fvwm/menus.c	2020-08-21 15:51:37.725036473 -0600
@@ -1651,6 +1651,10 @@
 		separator_height = (last_item_has_relief) ?
 			MENU_SEPARATOR_HEIGHT + relief_thickness :
 			MENU_SEPARATOR_TOTAL_HEIGHT;
+		if (MST_DO_FLAT_SEPARATOR(msp->menu))
+		{
+			separator_height += 1;
+		}
 		MI_Y_OFFSET(mi) = y;
 		if (MI_IS_TITLE(mi))
 		{
Only in fvwm-patched/fvwm: menus.c.orig
diff --unified --recursive --text fvwm-2.6.9/fvwm/menustyle.c fvwm-patched/fvwm/menustyle.c
--- fvwm-2.6.9/fvwm/menustyle.c	2018-05-26 05:35:26.000000000 -0600
+++ fvwm-patched/fvwm/menustyle.c	2020-08-21 15:51:37.725036473 -0600
@@ -430,7 +430,7 @@
 		"TrianglesUseFore",
 		"TitleColorset", "HilightTitleBack",
 		"TitleFont",
-		"VerticalMargins",
+		"VerticalMargins", "FlatSeparators",
 		"UniqueHotkeyActivatesImmediate",
 		NULL
 	};
@@ -900,6 +900,7 @@
 			ST_SCROLL_OFF_PAGE(tmpms) = 1;
 			ST_DO_HILIGHT_TITLE_BACK(tmpms) = 0;
 			ST_USING_DEFAULT_TITLEFONT(tmpms) = True;
+			ST_DO_FLAT_SEPARATOR(tmpms) = 0;
 			has_gc_changed = True;
 			option = "fvwm";
 		}
@@ -1605,6 +1606,9 @@
 		case 63: /* UniqueHotKeyActivatesImmediate */
 			ST_HOTKEY_ACTIVATES_IMMEDIATE(tmpms) = on;
 			break;
+		case 63: /* FlatSeparators */
+			ST_DO_FLAT_SEPARATOR(tmpms) = on;
+			break;
 
 #if 0
 		case 99: /* PositionHints */
@@ -1863,6 +1867,8 @@
 	ST_TRIANGLES_USE_FORE(destms) = ST_TRIANGLES_USE_FORE(origms);
 	/* Title */
 	ST_DO_HILIGHT_TITLE_BACK(destms) = ST_DO_HILIGHT_TITLE_BACK(origms);
+	/* FlatSeparators */
+	ST_DO_FLAT_SEPARATOR(destms) = ST_DO_FLAT_SEPARATOR(origms);
 
 	menustyle_update(destms);
 
Only in fvwm-patched/fvwm: menustyle.c.orig
diff --unified --recursive --text fvwm-2.6.9/fvwm/menustyle.h fvwm-patched/fvwm/menustyle.h
--- fvwm-2.6.9/fvwm/menustyle.h	2016-10-15 08:51:45.000000000 -0600
+++ fvwm-patched/fvwm/menustyle.h	2020-08-21 15:51:37.725036473 -0600
@@ -23,6 +23,8 @@
 #define MST_FACE(m)                   ((m)->s->ms->look.face)
 #define ST_DO_HILIGHT_BACK(s)         ((s)->look.flags.do_hilight_back)
 #define MST_DO_HILIGHT_BACK(m)        ((m)->s->ms->look.flags.do_hilight_back)
+#define ST_DO_FLAT_SEPARATOR(s)       ((s)->look.flags.do_flat_separator)
+#define MST_DO_FLAT_SEPARATOR(m)      ((m)->s->ms->look.flags.do_flat_separator)
 #define ST_DO_HILIGHT_FORE(s)         ((s)->look.flags.do_hilight_fore)
 #define MST_DO_HILIGHT_FORE(m)        ((m)->s->ms->look.flags.do_hilight_fore)
 #define ST_DO_HILIGHT_TITLE_BACK(s)   ((s)->look.flags.do_hilight_title_back)
@@ -282,6 +284,7 @@
 		unsigned has_title_cset : 1;
 		unsigned do_hilight_title_back : 1;
 		unsigned using_default_titlefont : 1;
+		unsigned do_flat_separator : 1;
 	} flags;
 	unsigned char ReliefThickness;
 	unsigned char TitleUnderlines;
