You can also use your keyboard. ALT+BS and click (cursor to) the last item ALT+BE. The option to hide the menu could be a user configuration option.

If you do not wish to see the Line/Row column, click on a value within the column and Ctrl+Del to remove the column from view. I like the column for sorting when reviewing a transaction and then reviewing the transaction in its placement in the cross account.

See Help > Keyboard in regards to Shift and Control keys.