You can now quickly and easily to add a custom image or logo by doing the following:

1. Make sure you are logged into Yahoo! and go to your fantasy team.
2. Click on the My Team tab | Select Edit Team Settings.
3. Under "Upload or choose a custom image,"click the Edit Custom Image button.

4. Click the Choose File button.
5. Select the image or logo on your computer that you want to use.
6. Click on Upload Image.
7. Click on Choose Image.

9. Click the Save button at the top or bottom of the Edit Team Information page for your custom image selection to take effect.

If you'd like to add more images for other teams, just repeat the process listed above for each team.

Please Note: 

• Your image will be seen by all members of your fantasy league and must comply with the Yahoo! Terms of Service and Yahoo! Help Community Guidelines.
• Only the following image formats can be use for custom images and logos:
  • .gif
  • .jpg
  • .png
• The maximum file size for each custom image is 10MB.
• We will automatically crop and center your image within a square aspect ratio.
   

As an alternative, you can use "How to upload and use an image from Gravatar."