Didnt found how to do that.
Just make your own GUI, and have the f5 button or any other key/button make it appear.
Make one button on the GUI call the SaveGameSlot function.
How do I make a GUI, and upload it?
What do you mean by 'upload'? Are you talking about importing a GUI from another game, uploading it to a server somewhere for others to use...?
If you're making a GUI from scratch, all you need to import into AGS is the graphics you want to use. Then go to the GUI editor window, and select 'New GUI' from the GUI menu.
Thanks, I think. I'll try it out.