To edit plans, you can go to the "Plans" tab in your professional space. Click on "Edit Plan" and then select the building and floor concerned from the dropdown menu at the top left.
To select a specific housing unit, click on the arrow at the top right and select the relevant one. You can now make your modifications freely.
A history tab allows you to view changes made to the plans, who made them, and when.
Only users with the role of Admin or "Edit Original Plans" can access the original plan.