Use the General tab of the Modify Group Membership Button Properties dialog box to set up how a Modify Group Membership button looks.
Once you set up the options on the General tab, click the Label tab to specify a caption or image for the button.
Create Modify Group Membership buttons
Set up a caption and image for a button
Use the Modify Group Membership dialog box
Options on the General tab of the Modify Group Membership Button Properties dialog box