How to I resolve key symbol flashing on my Siemens iQ500 con?

Key button is up on my Siemens condenser dryer. It flashes when I turn dial to anything but off and also beeps. There is a simple touch screen panel I don't see any menu button.
On the machine is written 'isensoric' and 'extraklasse' and 'iQ500'
Any help appreciated. Thank you
PS it also has on the screen '1:50' and a clock symbol with dots for the uppermost part of circle of clock.
Dee, January 2023

Childproof lock has been turned on.
Timer delay start has been turned on
Both are covered in the manual.

Fghjk, January 2023