Tutorial Updated to ocPortal version 9
Version 9 has a visual aid to guide the admin to the correct interface for many of the graphics on its pages. A link button to the image source will appear while hovering the mouse over the upper left logo.method 1: Upload a new image directly
From the 'edit theme image' screen, If you want to edit this image, right click on it and ask your web browser to save it, then blank out the URL field and attach your new copy to the Upload field.
Alternatively, ocPortal maintains a blank logo template which can be accessed in a similar fashion through your current theme image manager. Using a blank template might be easier to modify in most cases, so here's how:method 2: Use a template to modify the image and then Upload
Home–>Admin Zone–>Style–>Manage themes; choose your current theme and click on Manage theme images, select General, scroll down to logo_template and click to edit.
As mentioned above, right click on it and ask your web browser to save it.
Use your favorite Image editor to compose your own logo.
Repeat the selection process above: Home–>Admin Zone–>Style–>Manage themes; choose your current theme and click on Manage theme images. This time select Logo, click on logo/-logo and upload the new version.
You can visit my DEMO site to view the result of this modification