What’s the expected behaviour if an image is dragged into the background editor? I’ve tried dragging png files into the editor (and the gallery section) and behaviour seems to vary in non-useful ways. If I drag a 160x120 it ignores it, if I drag a 270x390 then it all goes pear-shaped and I get a non-responsive editor with mouse pointer left as a cross/crosshair.
Are you dragging into the sprite editor? This is how I’ve been using pre-made images for backgrounds and sprites: https://learn.adafruit.com/next-level-makecode-arcade-games/asset-tool
I was trying to drag them into the sprite editor. I thought it would just ignore them if it couldn’t handle them. I just made a 160x120 and that causes the “crosshair lockup”, here it is:
I’ll give your technique a go, thanks.