unlock symbol

Hello

I have a ResMed Airsense 10 autoset Cpap machine supplied by my local hospital on the NHS, I am trying to change the settings to do a daily test. it lets me change setting from monthly to daily but don't save the settings, I noticed a lock symbol on screen is this anything to do with why it won't save my info.

Thankyou

You need to access the clinician menu--(not included with machine).
It can be found at apneaboard, free of charge.
There are also videos online showing the "secret handshake".
Always write down the original settings before diving in.
UK providers can be possessive about their power over your settings.
It is best to keep them "out of the loop."