Hm, perhaps there are plugins that does this – I’ve never tried it myself, but give it a shot:
If that doesn’t work, try this:
Under where it says “Top Center”, they give this example code:
add_image_size( 'wordpress-thumbnail', 200, 200, array( 'center', 'top' ) );
So, the image sizes to edit would be in functions.php on line 76-78 (for Magaziner 3.0), there it says:
// Thumbnail sizes add_image_size( 'magaziner-small', 160, 160, true ); add_image_size( 'magaziner-medium', 520, 292, true ); add_image_size( 'magaziner-large', 1000, 562, true );
Modify it as you wish and then regenerate thumbnails.