How to cancel an order as a buyer

How to delete a draft order

You can delete any order that is still in a Draft state, meaning it hasn't been submitted to a vendor yet.

Simply click on the dot menu in the upper right hand corner and select Delete Draft:

There will be a confirmation dialog so you don't accidentally delete an order with one click!

How to cancel an order after the seller has received it

If the order hasn't been shipped or paid for then you can request that the seller cancel your order. Same process as above, but the option is now labeled Request Cancellation:

This will take you to the Messages tab, where you can write the seller a message to let them know why you'd like to cancel the order: