Starting with this update, you can assign work not just by day, but also by week, or month.
Note: The work can be assigned in Hours, Person days, or FTE. At this time, when using Units, you can only assign work by Day.
When assigning work for a specific project you can add the Resources panel to the Work Plan via the gear and update project assignment directly in the Resources panel.
When assigning or leveling work assignments between multiple projects, users or groups, navigate to Resource Load and select the Resource Planning view from the gear.