

1,677,946
@theirname with no space. Their pic and name will pop up click on it and bingo you've tagged them.
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Jim Crawford
Fredericksburg, VA
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John McCormack, CRS
Albuquerque, NM
8,289,389
You can select your own reasons to tag members. However, do not assume that everybody will respond to your tag and read your comments.
If you want people to see comments, leave them on their blogs or send a message.
630,351
921,504
If you comment on their question or blog they will be notified automaticly.
To tag use this sequence:
<shift> + <@> enter name if pop up window.
316,148
4,322,295
Just by starting with '@' - and start typing their names as you see a dropdown for the options you pick from.
3,988,144
I will tag them in a blog post or in a comment if it isn't their thread. I don't want them to get too many notifications.