Sandbox mode allows users to test changes without affecting the existing Gantt chart.
You can adjust task schedules, resource assignments, and more - and then see how those changes would affect the overall timeline. If you like the changes, you can apply them to the live chart. If not, delete the changes that didn't work, or close the sandbox to return to the live chart.
Creating a SandboxWorking in a SandboxApplying Sandbox ChangesManaging SandboxesOpening a Saved Sandbox
Users must have Control access for the structure in order to create or edit a sandbox.