This image shows the PuTTY Key Generator dialog box after generating a key.
There are menu labels at the top for File, Key, Conversions, and Help.

In the Key section there is a field with sample text, labeled "Public key for pasting into OpenSSH authorized_keys file." 
There is a menu with the items Undo, Cut, Copy (surrounded by a red border), Paste, Delete, Select All, Right to left Reading order, Show Unicode control Characters, and Insert Unicode control characters.
The menu hides most of the other options on the dialog box.