Under Voting and Tracking options, click Use voting buttons, and then click the voting button names you want to use in the box.
To create your own voting button names, delete the default button names, and then type any text you want. Separate the text with semicolons. For example: Small;Large;Extra Large.
To track the voting responses, select the Save sent message to check box, and then enter the folder name where you want the message saved.
Notes
For information about viewing vote responses, see Microsoft Outlook Help.