You can modify the rights of certain users in a scene. To do so, click on 'User rights' after entering 'Members'. 

To modify rights, click on the green plus icon next to the username. You can add multiple users to the list, (maximum 5) so their rights can me modified simultaniously. 

If the lines are grey, they cannot be changed with your authorization. The ones that you can change, the options are the following: 

• X – does not have the right
• A – has the right
• G – has the right and can give right to others