- 2-Column Headers are 660px wide
- 3-Column Headers are 940px wide
After you have installed your Background and uploaded your Header go to:
Template > Customize > Adjust Widths > Entire Blog Width
Play with the width until it looks right. (It will be about 660px for a 2-Column and about 940px for 3-Column)
My "Stylized Header" is not cut-out like it's supposed to be
DON'T click "shrink to fit" when uploading a "stylized header" (they are .PNG). The rectangle headers (.JPG) may be shrunk to fit just fine.
Read about using different sized BACKGROUNDS on different sized layouts, here.