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I was playing with the "Add polygon Feature" in QGIS. I ended up with some weird ugly polygon. How do I delete the polygon?

Weird polygon

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    FYI, all the green X's are places where the polygon boundary intersects itself, which is invalid geometry. If you create a polygon with self-intersections, it will cause lots of errors later. – csk Nov 24 '19 at 16:52
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    To understand rollback and de-duplication on this question see gis.meta.stackexchange.com/questions/5104/… – PolyGeo Nov 24 '19 at 21:37
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Select your polygon you wish to delete enter image description here on the canvas or attribute table, then press the red trash bin enter image description here or alternatively delete key on your keyboard. Make sure editing mode is enabled enter image description here when doing this. Otherwise the red trash bin is greyed out.

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