How can I get a list of orders placed with a specific payment method, such as invoice, during a certain period?

Go to Orders.

In the Payment column, right-click the column header and filter by the payment method, for example ManualInvoice.

In the Created column, apply a date filter for the desired time period.

This will show all orders placed with the selected payment method within the chosen date range.

If the columns do not show in your grid, look to the upper right corner where you'll find the "Column Options" menu. Here, you can easily search, add or remove columns.