Private Messaging ...

[Cherub (a.k.a. Steve L.)]

is pretty neat. I miss having a .WAB (Window's Address Book) equiv. for the TO: field, and got quite a few send errors, but ...
I put a line of userids, followed by a line of equivalent realnames, into a message. I can then retrieve the message from my outbox, and selectively copy/paste into a new message's TO: field.

[Cherub (a.k.a. Steve L.)]

And, if you know just a little bit of HTML (HyperText Markup Language), you can do some neat stuff!

[Cherub (a.k.a. Steve L.)]

In fact, just using the same two rows of buttons as in the Add Tags: section available above let you use several HTML tags.

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or insert an image

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just 'hover' your mouse over a button to see its name/function
and if you DO know a little HTML, so _much the ^better!