Adobe Acrobat 7 Professional - Manual (Page 259)

Deleting custom stamps
Use the Stamps palette to delete custom stamps and stamp categories. You can delete only
the custom stamps that you created, not the predefined stamps. When you delete a stamp,
the stamp is removed from the Stamp Tool menu, but the stamp file is not deleted.
To delete stamps:
1. From the Stamp Tool menu on the Commenting toolbar, choose Show Stamps Palette.
2. Choose the stamp category from the pop-up menu, right-click (Windows) or Control-click
(Mac OS) the custom stamp, and choose Delete from the pop-up menu.
3. If you haven't provided a name in the Identity preferences, the Identity Setup dialog box
prompts you to do so.
To delete a custom stamp category:
1. Choose Manage Stamps from the Commenting toolbar.
2. Select the category you want to delete, and then click Delete.
Note: Deleting all stamps in a custom stamp category deletes the custom stamp category.