Board Thread:Support Requests - Getting Technical/@comment-37511928-20190311021506/@comment-9605025-20190315013406

Because you repeated your question, I am assuming you use VisualEditor. You have two options. First, you can switch to source mode and then use the MediaWiki markup mentioned on the page Frostvalor linked to. Second, you can select a cell in a row, click the tab that appears to the left if the table next to the row the cell is in, and select either "insert above" or "insert below". - Edit:

This is actually already explained on the page Frostvalor linked to; right here, point #4. Please actually read the page next time.