From the Included tab, you can indicate if you want this template to include all retail products, or just some of them.

Select the All Retail Products radio button to include a count of all retail products.
When All Retail Products is selected you can also specify the count to include Loaner and Rentals.

When Include Loaners and Rentals is checked, the inventory count will include retail products marked as IsLoaner or IsRental in the inventory count. When adding retail products to an inventory count template, the Product Search functionality will include loaners and rentals in the results.
OR
Select the radio button for Selected Retail Products to pick and choose.
To select specific retail products to be counted, use the New Item section to search by Product Type, Catalog Item, and/or SKU.
Use the Add button to perform a Product Catalog search to locate the product(s) you want.
Highlight the product, right-click and choose Select to add it to the window.
Click Save to keep your changes.