Use Check Boxes on a Document Page. Create a new Word document, then click the âFileâ menu. Click âOptionsâ to display the Options dialog box. Click Customize Ribbon in the dialogâs left pane, then click the Developer check box.This tells Word that you want to reveal the normally hidden Developer tab.This tab has a button that lets you insert check boxes in Word documents. Step 2. Click the Developer tab, then click the Legacy Tools button in the Controls group.Click the check box control to insert a check box into the current document.his tells Word that you want to reveal the normally hidden Developer tab. This tab has a button that lets you insert check boxes in Word documents. Step 2. Click the Developer tab, then click the Legacy Tools button in the Controls group.