A quick summary of the layers:
0 - front
2 - default when placing background in a room
3 - back
You cannot set the layer by default, you have to use a custom action:
The action appears in tab Display, as "Adv Change" (Background is truncated)
This is a modification of the default Change Background action; this one allows you to choose the layer. For the new Layer property, you should put in one of the four layer numbers.
And when the background is placed with the action, you can make it scroll with the Scroll Background action.
Programmer in Visual Basic and experienced user of DS Game Maker 4 and 5 Pro.
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