One way would be to use the button that is used for the "About" link on the far right of the main toolbar. Insert the logo as the button image in the Skin editor.
Click the About item in the Main area, then the Edit button. Then click the folder icon and browse to the logo.
Helpful and Handy Links
Thanks, that looks pretty straightforward. Love these forums...
The About box in WebHelp is one of the many interface items you may wish to customize. Left as is, it will display the "Powered by RoboHelp" sign. You can replace this with your company logo, product symbol, or simply remove it. Three different procedures are detailed below. The first procedure is done within the confines of RoboHelp. Should you follow this step, each time you generate the WebHelp file, the information is included in the output. However, if you wish to follow any of the other procedures detailed below, RoboHelp will automatically return the About box status to its default values. Therefore, you should copy the modified files that you are instructed to change to another location outside the SSL directory. After you generate the file, copy the files from the stored location and replace the newly-generated files with the ones you modified to recreate your changes.
Message was edited by Peter Grainge to remove gaps in text.