This option is used to check to see if a polygon passes the polygon checks test
performed by a polygon box in a panel.

Continue down the page to see the Check Polygon Panel options.

To view the Check Polygon Panel,

Use: Utilities => A-G => Check/Clash=> Check Polygon

This panel has been documented under the Tin menu, if you would like to view the post for the Check Polygon panel,

Visit this post: Check Polygon