Question

how can I invite other users to tell their ideas about a question?

Answer 1

if they are openstudy users already, just tag them by doing something like @moradi312 , if they're not on openstudy, you can either manually invite them via email or just hit the facebook and twitter buttons above this reply and below your question.

Answer 2

I mean how can I tag them?(like what you did)

Answer 3

use the '@' symbol before their name. @moradi312