You can replace the default Plesk logo banner in the top frame with your own logo, and change the text that displays in the web browser's title bar. You can also make your logo a clickable hyperlink.
You should use a GIF, JPEG or PNG format file for your logo, preferably not larger than 100 kilobytes to minimize the download time. It is recommended that you use an image of 50 pixels in height.
To change the control panel's logo image and text shown in web browser's title bar:
You can use {product_name_version}
and {plesk_key_id}
variables to display product title (Plesk) with version number and key ID respectively.
When you wish to restore the default Plesk logo, click Default Logo.