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They can be assigned to one ore more user groups so you can have for instance a workbench for the sales people, a workbench for artist, a workbench for addops etc.
Workbench
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for users
If a user has a workbench assigned there will be a workbench icon + the name of the workbench - in this case ‘X1 WORKBENCH’ - in the top left corner:
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