This is amazing!
I was looking for something like this for a while now!
there is a bit of a problem with the desktop version tho, the description text that appears when you hover over the line sliders get blocked from view by other sliders.
The program also crashes if you try to right-click with the line tool without placing a second point
it then opens a code error window with the following message
___________________________________________
############################################################################################
ERROR in
action number 1
of Step Event0
for object obj_draw_handler:
Pop :: Execution Error - Variable set failed being_drawn - read only variable?
at gml_Script_anon_gml_Object_obj_draw_handler_Create_0_1561_gml_Object_obj_draw_handler_Create_0
############################################################################################
gml_Script_anon_gml_Object_obj_draw_handler_Create_0_1561_gml_Object_obj_draw_handler_Create_0 (line -1)
gml_Object_obj_draw_handler_Step_0