How to send text message?
To send text message, press "Send SMS" option in the context menu of the tree of projects (Space key).
New window will appear automatically. In this window select phone number of the recipient (numbers are displayed on the left panel of the window) or enter another number. Than type message and press "Send" button. For this purpose you can also use "Send SMS ..." link located next to the phone number in user profiles or your contacts.