The Edit menu has choices for editing and deleting mail messages and configuring your Mail Tool from the Mail Tool Properties window.
Use Cut and Copy to put selected messages onto the clipboard. You can then paste these messages from the clipboard into other windows using the Text Pane menu. These options are dimmed if you do not have any selected messages.
Use Undelete to restore deleted messages. When you save your Mail Tool changes, deleted messages are really deleted, and can no longer be restored. The Undelete option is dimmed if you do not have any deleted messages.
Use Properties to customize your Mail Tool. See "Customizing Mail Tool" for information about Mail Tool properties.
The default item of the Edit menu is Delete. When you choose Delete, the currently selected messages are deleted or the currently viewed messages are deleted if no messages are selected.