Hi John the steps below shows you how to use the remote. If you need more information there's a link included for the Humax website. There you'll find the codes and also setup guides.
https://uk.humaxdigital.com/support/rem_code/

How to use the Universal Remote Control
1. Select the mode(PVR, TV, DVD, AUDIO) you want to set by
pressing the corresponding button on the remote control. The button will blink once.
2. Keep pressing the button for 3 seconds until the button lights on.
3. Enter the 3-digit code. Every time a number is entered, the button will blink. When the third digit is entered, the button will blink twice.
4. If a valid 3-digit code is entered, the product will power off.
5. Press the OK button and the mode button will blink three times. The setup is complete.
6. If the product does not power off, repeat the instruction from 3 to 5.
Note:
• When no code is entered for one minute the universal setting mode will switch to normal mode.
• Try several setting codes and select the code that has the most functions.