I noticed in the figma playground files, the layers have preview thumbnails that help distinguish layer type such as section and show contents within frames...I am wondering how this is done to add to my own files?

I noticed in the figma playground files, the layers have preview thumbnails that help distinguish layer type such as section and show contents within frames...I am wondering how this is done to add to my own files?
I answered this myself….its the draw mode visuals
incase someone else is looking for this
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