If you need to pause a project, you can move future assignments to a later estimated start date.
Check if the project team member(s) have capacity in the future
From the Project Planner, expand the project to view the project team members
Click on the person's name to open their schedule on a split screen. You'll see if they have the capacity to take on the work in the future
If there is no conflict, you can extend or move the assignment and the employee will now have an updated schedule.
If you click their name in the split screen, it will open the side panel, where you can add a note and @mention another user to notify them if needed.
If the project team members do not have the capacity to take on the work, transfer future assignments to a placeholder and submit a new resource request if needed.
Move the assignments
Use the 3 dot menu to access "Select All to the Right" and then you can drag them forward:
If you need to do this for several people (or several projects for one person), use the 3 dot menu to enable "Enable multi-select", and then select all the assigments and drag them forward. If you have some assignments that need to be split first, you can use the 3 dot menu to snip it before enabling multi-select: