How to add multiple rows/columns in writer at one go

Hello,
Adding rows/columns one at a time is a pain when lots of them have to be added to an already existing table. So how to add multiple rows/columns in writer at one go.

Thank you for helping.

Go to the table menu:

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Or, in the table, just select the number of rows (or columns) you want to add and press the Rows Below (or Columns After).