In most businesses, you have bills that you pay every month, like utilities. By setting up recurring entries, you can save a great deal of time entering these purchases and payments.
The process is basically the same for entering recurring purchases or payments.
Complete the transaction as you normally would. For purchases, you have to assign a starting invoice. All of the transactions will be numbered incrementally; for example, if you enter 4501, the next invoice will be numbered 4502.
Note: You are actually creating a transaction here, not just a template.
Even if the amount will differ for the next time, it's helpful to have all the other information filled out for you. Then, you only have to change the amount.