How can the width of the header be changed on an iWeb template?
Open the Inspector and go to Page Layout and you can alter sizes there.
Some templates cannot be altered though and because of how they are the page and header sizes vary.
If want something that can be fully customised, then go for the white template instead.
The themes that can be customized as to width are White, Black and Modern Frame. Others use fixed width image files as part of the page design and can't be scaled.
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