diff --git a/pyembroidery b/pyembroidery
index b603b8d2b..afe103b49 160000
--- a/pyembroidery
+++ b/pyembroidery
@@ -1 +1 @@
-Subproject commit b603b8d2b2bf91b5b0823a8a619562de5fd756e7
+Subproject commit afe103b49a1750c5aabe612dbdc6793ef21951b0
diff --git a/templates/output_params_gcode.xml b/templates/output_params_gcode.xml
index 97e6cacf1..1326527b4 100644
--- a/templates/output_params_gcode.xml
+++ b/templates/output_params_gcode.xml
@@ -14,10 +14,11 @@
         <param name="custom_stitch" type="string" appearance="multiline" gui-text="STITCH"
             gui-description="Use '%X' for x-coordinate. Use '%Y' for y-coordinate and '%Z' for z-coordinate."></param>
         <param name="custom_color_change" type="string" appearance="multiline" gui-text="COLOR CHANGE"
-            gui-description="Leave empty to use default value. Use 'none' to remove."></param>
+            gui-description="Leave empty to use default value. Use 'none' to remove. Use %R %G %B for thread color values"></param>
         <param name="custom_stop" type="string" appearance="multiline" gui-text="STOP"
             gui-description="Leave empty to use default value. Use 'none' to remove."></param>
-        <param name="custom_start" type="string" appearance="multiline" gui-text="START"></param>
+        <param name="custom_start" type="string" appearance="multiline" gui-text="START"
+            gui-description="Use %R %G %B for inital color thread color values"></param>
         <param name="custom_end" type="string" appearance="multiline" gui-text="END"></param>
     </page>
     <page name="laser" gui-text="Laser Settings">