Adding contacts to campaignes already released

Adding contacts to campaignes already released

Hello, could you pleas advise with one simple problem:

after releasing campaign I would like to send it to some more contacts that came to the mailing list after releasing it. 
In ZOHO CRM it is easy - I simply sending email, choosing template, I can add new contacts to campaign already released. In CAMPAIGNS I can find simple solution. Pleasee addvise how to do it with 'two clicks'