Drawing on your maps is a very useful feature, but sometimes you need to hide what you've added.
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Maybe you want to start fresh and see what you can find. Or maybe you're trying to show someone a detail in the system and don't want to give away everything you're working on.

Luckily hiding all that info is as easy as a click.

At the top right-hand corner, toggle the show annotations switch like so:

That should give you the clarity and privacy you need.