You can replace the Gallery logo with your own logo at the top of every page.
Step 1. Make a logo that fits the space in the theme you are using. Check the height & width of the Gallery logo being used in the theme.
Step 2. Create a directory called "local" in the theme's template directory.
The easiest way, for you non-geeks, is to use your FTP program.
The new directory should be here:
http://yourWebsite.com/gallery/themes/yourTheme/templates/local
You may have the Gallery installed in a different location. Just make sure that wherever Gallery is installed, the rest of the line is as in this example.
Step 3. On your computer, make a copy of the file "theme.tpl".
Making a copy means you will have a saved copy of the original file if something breaks.
Open this file in a text editor (not a word processor).
Step 4. Find the following section near the top of the file:
<div id="gsHeader"> <img src="{g->url href="images/galleryLogo_sm.gif"}" width="107" height="48" alt=""/> </div>
Change the "img" line to something like this:
<img src="{g->url href="themes/YourTheme/images/yourLogo.gif"}" width="107" height="48" alt=""/>
Change the width and height to the proper size. The alt text should be a description of your website's gallery (a brief phrase).
Below this is a similar set of lines:
<a href="{g->url}"><img src="{g->url href="themes/croos/images/galleryLogo_sm.gif"}" width="107" height="48" alt=""/></a>
Make the same changes to the text following "url href".
Step 5. Make the link point to your website.
Remove the line:<a href="{g->url}">and replace it with the required link to your website as in this example:
<a href="http://yourWebsite.com/">
Copy this file (via ftp) to the local folder you made earlier.
Step 6. Copy your logo to the images directory.
Each theme has an images folder; simply copy your file to this folder via ftp.
Files can be in formats other than gif; a transparent gif may fit into the existing structure better. At this point, you'll want to work on the theme via css -- and that's a whole different discussion.
Step 7. Clear the template cache.
Go the Site Admin/Maintenance and click the link for "delete template cache" (click "run now" under Action). Your logo should now appear at the top of the page.
=== Multisite Logo ===
To use a different logo in each multisite install use a line in theme.tpl like this:
<img src="{g->url href="sitelogo.jpg" forceDirect=true}" alt=""/>
Then put a sitelogo.jpg file in each multisite directory.