How do I compare wip with last month?

1. Open Reports, then WIP.
2. Leave the view on Now, or pick a saved month from the view list.
3. In the Compare with list beside it, pick Compare with now or a saved month.
4. The figures card becomes a small table: the earlier period, the later one, and the change.
5. Each job's figure shows how far it moved, since the earlier month or by the later one.
6. Pick No comparison to go back.