Thanks for clarifying the automatic shapes during capture. The rounded rectangle works well.
The second part of my question . . .
Once a shape is on the slide, if I want to change it to an entirely different shape, it doesn't seem possible. For example, if I start with a cloud shape, in the Properties panel there is a choice of 3 other shapes I can change it to. But how can I change it to a completely different shape, for instance change a cloud into an arrow?
It seems like that was possible in previous versions, but maybe I'm not remembering correctly.
Each shape can be converted to another shape or a freeform shape, use the right-click menu. And that is the same work flow as I used in 7..