Changing header Background image

After installation of quick start package:

I wish to change the header background image which appears on all the pages. I am looking into forms but I am unable to locate the settings or folder where I can see this image and replace by my own image.

I have checked my demo/images folder and not hind it there. Also where is wp_content/ themes / university folder as it was mentioned in one of the question.

I am a new to the theme, please be specific while answering.

Hi,

Also where is wp_content/ themes / university

Sorry you have Joomla or Wordpress installed ?
Most of templates images are located here: /templates/gk_university/images/

joomla

Joomla do not have such a folders wp_content/ themes
only Wordpress does.

Where is this image in Joomla Folder template, is it picking from images in ( images/demo )header_bg or guest_bg.
But where its this image is set to display ?

Got it,
Image has to be changed from server ( I am using Cpanel).

>File manager
>public_html/templates/gk_university/images
>We need to replace the image named bg (1720*500)

I dont know why this configuration can't be designed to be changed from joomla interface ?

Thanks.

Some images are part of template, so they are located in template /image folder,
and Joomla Media Manager do not have access to this area,
but there is a Template Manager , where in template mode you can do small tasks with files as well.

Some images can be overridden by CSS.

Besides... you do it only ones.