Instructions. Click the Developer menu option on your Excel spreadsheet. Find the Controls group on the Developer menu. It's located in the center on the top of the spreadsheet. Click the Insert option in the Form Controls group to insert the selection box.Click on the Check Box (Form Control) option.Click the cell on your spreadsheet where you want to add the selection box. You can now use the selection box to select or de-select information in your spreadsheet.t's located in the center on the top of the spreadsheet. Click the Insert option in the Form Controls group to insert the selection box. Click on the Check Box (Form Control) option. Click the cell on your spreadsheet where you want to add the selection box.