This video describes how to change the logo in Google Apps to a custom logo.
First, you must be an administrator on the domain, and your logo has to be formatted correctly. Google accepts .png, .jpg, and .gif files. They must be under 20kb in size and 143×59 pixels or less. Using different dimensions can cause your logo to be stretched. To upload your logo:
- Click Settings on right hand side of Gmail
- Choose Manage this domain
- Click the Domain settings tab
- Click the Appearance tab
- Select Custom logo
- Upload your file