You can place a hold on an item that is checked out by clicking on the "Place Hold" button that is located above the status of the item:
You will then be prompted to fill out a "Request a Recall" card:
You can place a hold on an item that is checked out by clicking on the "Place Hold" button that is located above the status of the item:
You will then be prompted to fill out a "Request a Recall" card: