To summarize :
I used Custom Header Logo on my forum version 3.0.1 without any problem.
The index image measures 965 x 400 pixels, and the logos of each forum 980 x 53.
I am working on a new forum, version 3.2.3 under Prosilver.
Of course, I handed Custom Header Logo.
But here, problem:
If the logo on the index page is displayed normally, the other images leave a blank space underneath them.
Is it possible to have several sizes of logos?
I searched a lot, maybe bad, but not finding, I come to you

Many thanks for your help, and patience

Guillaume