Export all orders
Go to Orders.
Click on Export > Export orders at the top right of the screen.
A pop-up window will open at the bottom right of the screen where you can go directly to the export. You can also download the export via Tools > Exports via the left menu of the Back Office.
Export selected orders
Go to Orders.
Select the checkbox next to the orders you want to export
Click on the drop-down menu Bulk actions at the top right.
Select Export to .csv.
A .csv file will be downloaded of all orders on that page. You can repeat this process per page by switching pages at the bottom right of Orders with the arrow keys.