Properties panel shortcuts

I'd like to have more control over the Properties panel and when it appears.

Is there a keyboard shortcut to Collapse/Expand the Properties panel? (I know about Ctrl-Shift-D, but that toggles through the open panels.)

Is there a way to prevent the Properties panel from expanding when double-clicking on an object? (Sometimes Properties gets in the way of the slide, especially when working on a smaller monitor or laptop.)