To change a staff members settings, simply go to the Settings tab on the left side menu bar.
On the new list, click on Staff.
This will open your staff list.
Click on the name of the staff member you're looking for and this will bring up their information.
Now you can change/edit their staff information and hit "save" at the bottom of the page once you made your changes.
To change their Settings or Permissions you can select "permissions at the top of the page next to profile.
To change any permissions just check or uncheck the boxes depending on your preferences. Then hit the Save button at the bottom of the page and you're done.