1- Open your file “functions.php” in a text editor
(will be located in your theme)
2- Find the following code:
define( ‘HEADER_IMAGE_HEIGHT’, apply_filters( ‘twentyten_header_image_height’, 198 ) );
3- Change “198” to your desired size
4– SAVE AND OVERWRITE YOUR PREVIOUS functions.php FILE
5- Re-upload your 198 pixel height banner / header
How do I make the header on the Twenty Ten theme less tall?
How do I shorten my theme header?
How do I shorten my Twenty Ten theme header?
Change size of top banner?
Change size of header?