To add a unit to your plan please follow the below steps:
1. Go to Insert Catalogue Items
2. Find the item you need either by inputting the order code (in item name field), using the filters in the search criteria (using Primary and Secondary type fields) or by using the description field
3. Once you have the item highlighted you can either drag and drop the item, press the enter key on your keyboard (this will add where the cursor is) or click the add button