This tutorial makes use of the free online image editor http://pixlr.com/advanced
Select "Aspect Ratio" from the Constraint drop down. Enter the Width and Height:
Feature - Width: 5, Height: 3
Facebook Cover - Width: 851, Height: 314
Profile - Width: 3, Height: 4
- Move and resize the wire box so that it only contains the section of the image that you want to keep. Press Return.
- Select "Image" -> "Image size..." Enter one of these widths:
Facebook Cover: 815
- Select "File" -> "Save..." Enter a name ending in ".jpg" and save to file to your computer.
Add your image to Cascade by doing New - yoursite - then selecting this new .jpg file and fill in the Display name and title - cutdown images are automatically generated by Cascade.
Another resource for Timeline cover photos is: http://timelinecoverbanner.com