Thanks to WordPress 3.0 changing the default header or logo of PRiNZ Pro themes is easy as 1, 2, 3. On the themes options page you can decide if you want to use the sitename (blogname) and description or a logo in the header of your WordPress site. By default a logo is used. If you go for a logo you surely want to use your own custom logo in the header. This tutorial shows you how to do that.
Go to Appearance > Header in your WordPress admin interface. You will ses a page that shows the current (default) header image, some information about that image (width, height), an upload box for a custom header image, a remove button to remove an image that was uploaded and a button to restore the original header image.
Now move to the upload field an click “browse” to browse your harddrive for an image that you like to use. Make sure it has the right dimensions (625×100 or 940×120 depending on the version). If it doesn´t have the right dimensions WordPress gives you the chance to crop it before uploading it.
Once you found the right image click upload. You´re done! That´s all you have to do. Your new custom header will now appear on your website.
Changing the allowed Image Dimensions
In case you want to change the dimensions of the header image from default to something different, you just need to open /tools/wp3-stuff.php (an include file of functions.php) and change the two figures to the values you like.
define( ‘HEADER_IMAGE’, ‘%s/images/logo.png’ ); // The default logo located in themes folder
define( ‘HEADER_IMAGE_WIDTH’, apply_filters( ”, 625 ) ); // Width of Logo
define( ‘HEADER_IMAGE_HEIGHT’, apply_filters( ”, 100 ) ); // Height of Logo
define( ‘NO_HEADER_TEXT’, true );
BUT ATTENTION: Make sure the new dimensions do not destroy your layout.