How to change Team users's permissions

Permissions allow you to restrict what each team member in your workspace can see

Permissions allow you to change what each User in your workspace can see, change, edit, etc.. 

You are able to change the permissions of the people below your current permission level, up to the level of access that you are granted. To pull up this screen click on Team:

Upon Clicking the permission box it will go over what each permission allows the user to do. For a full overview of what each permission lets you do you can check out this FAQ: What are the User Permissions?

If you would like the User to see all projects in the workspace even if they are not a member, they have to be at least a Manager.