To save your project, be sure to click the save button located at the top right of your page regularly.
A red dot appears when changes that were made have not been saved yet. Make sure to save your changes regularly.
To undo the last modification made to your plan, click the undo arrow (left arrow) located at the top right of your page. If you want to redo the change you just undid, click the right arrow.
It is not possible to undo the last change if you saved your project after the change.
