Since v3.2.0 of the add-on it is possible to perform additional operations on present in a Staffing Timeline macro resources and activities.
To do so simply use drag and drop technique in an "Activities view" (1) for displacing activities and respectively "Resources view" (2) for resources to place it elsewhere (as in the below example for resource named "Zed"):
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"Unassigned" (3) resource will always be unmovable and is to stay at the bottom.
After doing drag and drop, you will observe placement of a given resource or activity in a new place in a column:
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