If you would like to enable Shared Workbook option, here's a way to add it to Excel Quick Access Toolbar. It is hidden under Excel Options.

For adding Windows Calculator to the Excel Toolbar, follow the following steps. Move the mouse cursor to the upper left-hand corner of your Excel sheet and look for the drop-down arrow.

Adding Forms to the Quick Access Toolbar To make accessing forms even easier, you can add the Forms command to your Quick Access Toolbar (QAT).