Modifying permissions in a colony is simple.
Before you give a user permissions in a colony, make sure you understand what the permissions in a colony enable.
Modify a user's permissions
Navigate to the your colony's Settings.
Click the Permissions tab.
Select the domain in which you want to modify permissions.
Select the user's avatar or paste in their Ethereum address.
Then select the permissions you want to change.
Yay! Your just modified a user's permissions! 🎉