EOS 5D Mark IV: Select and erase

If you want to quickly erase a large number of images from your memory card, you can use the select and erase option. In the Blue-1 menu, choose Erase images and then Select and erase images. Now you can move through the images on your memory card and use the SET button to give them a check mark. Pressing the erase button will then delete those images that you have check marked.
EOS 5D Mark IV