When clicking on the dropdown icon next to "Own equipment" in the reservation screen, you will get a view of where your equipment is located.
You can change your equipment allocation between projects when periods overlap. In this case, you can remove your items from "Project A" and assign them to "Project B". You can do this is by clicking on the project bar and changing the number of items you want to reserve in the pop-up screen. Select the amount of equipment you want to reserve from your warehouse stock by setting a number in the “reserved for project” field and save.