"Performance issues with multiple art boards"

In the page view I feel like a little language change on the “Delete screen size” to “Delete art board” or “Hide screen size” might be helpful. I was afraid it would remove the breakpoint and didn’t try it until our editor was getting really slow.
Maybe even add a warning about multiple canvas’s decreasing performance could be nice. I don’t think any of our content editors would have thought to remove a screen size when their laptop was crashing.