How to add columns and rows to Matrix questions

This animation summarizes the actions for adding columns and rows as well as deleting them:

Below are still images breaking down the steps/actions for inserting columns and rows

Click one or more of the square checkboxes above a column or to the left of a row

A pop-up menu will appear, allowing you to Insert, Move, Delete, or Add an input box.

Selecting a row provides the same functionality

Selecting multiple columns or rows allows for inserting multiple new columns or rows at once