OK, I'm a total newbie and am prepared to be shot down, but I cannot find the most basic option of how to manage layers.

After creating a new page I put a plain rectangle on it - the text at the bottom tells me it's on the 'mouse-off' layer. I then want to put an identical rectangle on top to create the 'mouse-over' layer so I create the rectangle and I can move it on top of the original rectangle etc, but there is no mention of 'layers' in the 'Page and layer gallery' box on the right, there's no option to 'move to layer behind' when the context menu is selected, so it appears that all objects are on the same layer.

This is obviously something very basic and I think I have gone through the relevant sections of the manual but it has defeated me.

Anyone able to tell me what I'm missing here.