Burning on canvas\ tile

What would be the settings to burn on painted canvas. I have a 3 Watt laser and would like to know how to do this. An also painted tiles. I have seen some of the results with other people and want to try it.
Thanks.

They created this handy little thing on the top right screen corner. If you use it to search, you’ll find all the answers you’re looking for.

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I don’t see anything on the upper right corner. What exactly is it labeled?

It’s the item I highlighted.