This might confuse new users - I’ve been thrown by it twice now:
Following the snake tutorial, for example, when I get to the part which says ‘Select the “layer1” layer.’ there seems to be no layer1 in the outline. ‘Tile Map’ is unfolded but nothing is visible below it and the dark interface has no indication that the divider above ‘Properties’ can be moved.
In short, might it be better if this part of the UI could expand to reveal its contents automatically or have some other indicator to show that some content is hidden?