Your Canon EOS 6D automatically names and numbers each image you take. The name isn’t all that descriptive, and the numbers are consecutive. Some photographers stay with the default numbering system because it helps keep track of the number of shutter actuations. But your EOS 6D is rated for 100,000 shutter actuations so that’s a moot point. To change the file-numbering system:

  1. Press the Menu button.

    The last used menu command is highlighted.

  2. Use the Multi-controller button to navigate to the Camera Settings 1 tab.

  3. Use the Multi-controller or the Quick Control dial to highlight File Numbering and then press the Set button.

    A menu appears with your file-numbering options.

  4. Use the Multi-controller or the Quick Control dial to highlight one of the following options:

    • Continuous: Numbers files in sequence, even when you insert a new card or store images in a different folder. Images are numbered to 9999 and then start over at 0001. When you use this option, start with a newly formatted card each time.

      If you use multiple cards that already have images on them, you may run into problems with duplicate filenames because file numbering may continue from the last image captured on the card. Duplicating filenames isn't a good thing if you’re storing all your images in the same folder.

    • Auto Reset: Numbers the first image with 0001 each time you insert the card in the camera or when images are stored in a new folder. This option works well if you store images from each shoot in their own folder when you download them to your computer, or rename the images when you download them to your computer.

    • Manual Reset: Creates a new folder and resets the numbering to 0001 after you press the Set button. After manually resetting file numbering, the numbering system reverts to the last option you specified, whether Continuous or Auto Reset.

  5. After highlighting the desired option, press Set to commit the change.

    The file-numbering option remains in effect until you change it with this menu command.