I have an idea that I want to push a few pixels, but I cannot select it in any way, which allows me to push. The easiest way to select it is to click its name in the list of objects on the left:

But using the arrow keys just moves the selection in this list up and down, choosing different things.
If I actually click the view in the preview window, it ultimately selects something behind it (there is a full-size background image that is selected no matter what I click on).
If I select a name in the list of objects and press Tab (thinking to change the focus to the layout panel), it simply enters the name editing mode (?!). The Tabs tab never focuses several times on the layout bar:

Seriously, this interface is corrupted. How to select an object to push it using the arrow keys? Is there any way?
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