What this is actually doing.
This is the focused version of “Focal point / visual weight checker”: do the one job, inspect the result, and move on without opening a full editor.
Presentation & Layout
Does one side feel too heavy?
Compare approximate visual weight and see the balance shift.
Inputs
Answer
Visually balanced
Useful to know
Four things worth knowing.
Where it stops.
It solves the named job, not every problem around it.
What to inspect.
View the slide full-screen. Editing view can hide how crowded a layout feels when presented.
Worth knowing.
Keep the original until the finished result has worked in the place you made it for.