The No Frill No Fill Challenge

[Acorn]

If I understand this correctly, then have you tried this method? Tabbing will cycle through all the shapes on the page. In the order the images are stacked. So, where you start determines the order of the tabbing.
But I'm slow. I see what you are saying.
In Pro+ you have stacked the filled rounded rectangles (why not use circles?) on the bottom in the Page & Layer Gallery. Once this is determined, then select all the bottom layers and delete them in one action.

Gary, I have tried.

Tab and delete and the object vanishes so Xara has no reference position so the next Tab jumps back to the top.
Tab and Move Shape to Next Layer - focus is now in that layer.
Tab into a Shadow Group and you flip there forever.
You can Tab and Paste Attributes or click the Colour bar and the Tab-cycle is not broken.

Acorn