Login to plus.google.com and click on top right icon of your profile.; Select the page you want to manage permission for additional user.; Click on manage account -> Manage permissions.;
Login to plus.google.com and click on top right icon of your profile.
Select the page you want to manage permission for additional user.
Click on manage account -> Manage permissions.
Click on add new user icon on top right corner.
Add email id or name (if user already exists in your circle) and choose role and then submit invite. Understanding of each role is as follows:
Rights of Owner: Add and remove managers, Remove listings, Edit business info, Manage YouTube videos and Hangouts on Air, Respond to reviews,
Rights of Manager: Edit business info, Manage YouTube videos and Hangouts on Air, Respond to reviews
Rights of Communication Manager: Respond to reviews