Few Theme Questions

1. What is the size of the Background for the header of the site? Each time I try to change the image, the image is too small.

2. Is there an instruction manual to configure these sites?

3. Profile settings do not work. When clicking settings tab, Visual Composer is continuously “loading”. The settings never actually pop up for users.

4. When a User logins and goes to create a team, a template is already shown. This template already has “Skywarrior” information written within the teams. How can I change this to what I want it to say when they open it?

5. Pretty much only the “USERS” have the option to create a Tournament…? The creator/admin cannot create a Tournament from the admin panel so the USERS could join?
Thank you