The Make a Payment tab displays any/all current open invoices. This may include employee/agent invoices depending on permissions and setup. Members can pay invoices from this tab by selecting the "Actions" option next to the specific invoice they wish to pay, or by using the "Make a Payment" button.  

Selecting "Actions" next to an open invoice will allow the member to make a credit card payment or download the invoice.

Using the "Make a Payment" button allows the member to select multiple invoices to pay at once. You can also filter to a membership type and only display membership renewal invoices

All invoices:

To filter to Membership invoices only, select the desired membership type from the dropdown and the display will update accordingly:

The next tab is the Autopay & Billing tab.