Learn how you can customize the F-Keys for the NMUS+ feature in the Sierra 4.0 software and also on the Sierra base unit. You may also like Installation – Adding NMUS1 Ultrasound to Sierra Summit Installation – Downloading, Unblocking, and Extracting Sierra 4 software – Sierra 4 Installation – Sierra 4 Software Upgrade Tutorial «12345…10»Page 3 of 10