SC2Mapster

Heya, there is one possible issue that may be messing up data changes up for you:
- Uncheck the Automatically Add Multiplayer Data box in Map -> Map Options
(if it is not in there, just look somewhere around there, you should find it soon)

Although I'm not too well versed with extension mods, but as far as I'm concerned, extension mods should overwrite existing data in a melee map, so I cannot help anymore than this, sorry.

There is an Action in triggers that allow you to enable Cinematic Mode which disables mouse inputs and hides UI. It is called Toggle Cinematic Mode, I think, something with Cinematic Mode in its name.

Here is the guide I used to get into mapmaking:
https://s2editor-guides.readthedocs.io/

Consider joining the SC2Mapster discord as well. It is a very indispensable resource where you can ask questions to other and more experienced mapmakers.
https://discord.com/invite/Jtzt8Su

I just want to revive this thread to say thank you to ImperialGood for figuring out a way to do this.  I've been trying for days to find something that worked for this.  To rephrase the method he found:

• In the Trigger editor, create a global variable -- let's call it Custom_Supply_Icon
• Set the initial value for Custom_Supply_Icon to a Custom Script:
  DialogControlHookupStandard(c_triggerControlTypeImage, "UIContainer/FullscreenUpperContainer/ResourcePanel/ResourceFrame/SupplyIcon")
• Create a trigger that fires at map initialization (or whenever you want to change the icon)
• Create a "Set Dialog Item Image" action with Custom_Supply_Icon for the dialog item and whatever image you want to use for the value

That's it!  Again, thanks ImperialGood for sharing this method!