Yes, Moderators can edit the subject line, message body, and remove attachments of a message in Pending status. When done, you need to click on the "Save and Approve" button.
Or, just Save if you want to look at it again before deciding to approve it.
?
Once you begin to edit someone's message in moderation, you have claimed it, and no other Moderator can open it.
Untrue.
No one can approve or reject a claimed pending message by email, but working on the web the claim only gives other moderators a warning - it doesn't actually prevent other moderators from "jumping your claim".
This is why it is unnecessary to have a way to remove the claim - if you become unable to ultimately approve or delete/reject the pending message, another moderator can step in and do it for you. Hopefully that's an infrequent occurrence.
Shal
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