Let's use an example to further clarify the purpose of the default item. Say you've already entered some reimbursable expenses for Job 01, and you've already created a default item named "\reimburse'
You've also opened the Sales window and begun creating an item sale, and you've clicked the Reimburse button in the Sales window to open the Customer Reimbursable Expenses window.
Enter your default item -- \reimburse -- in the Reimbursement Item field, then click the Action column for the two reimbursable expenses in the scrolling list. When you're finished, click the Reimburse button at the bottom of the window.
The Sales window reappears, displaying the two line items that were previously in the Customer Reimbursable Expenses window. Notice that each line item is assigned to \reimburse, as well as to Job 01.
When you click Record in the Sales window, the reimbursable expenses will be recorded on the item sale. That's it!