This tutorial makes use of the free online image editor http://pixlr.com/express
- Click Browse button and choose your local photo you want to edit.
- Move and resize your original image unti it fits inside the white box, then Click Apply button
- Click Save and save your image as a .jpg file(you can keep the 85% optimization default
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