To alter the image that you are using on your Newforma Template Styles, first establish the Logo file you want to associate with your Form Template Styles.  Copy your logo file to the following location on your Info Exchange Server.  The path will be slightly different as it should reflect the path to you specific Info Exchange server address.
 
https://infoexchange.yourdomain.com/remoteweb/logo.img

This image file can be any of the following formats:  .img, .bmp, .jpg, .jpeg, .gif, .tif, or .tiff.

After Placing the Logo image in its correct location, go into the Newforma Administration console, and navigate to the Servers tab.  Highlight your Newforma Project Center Server; below navigate to the Notifications/Forms tab.  In the lower area of this screen, you can highlight your Default style; if you are changing this on a custom style highlight that style.  By double clicking or selecting modify from the left side of the screen.  The following dialogue will come up and you can modify the path to the new image file that you want to use on your Form Templates.

This new image will now be displayed on your Newforma Form Templates.