Digital Signature in ZimmerSoftware

How can I activate the digital signature in the online check-in?
How can the guest digitally sign during the online check-in?
If you have not yet activated the online check-in, please activate it first.

You can find the related help article here:
https://w40.zimmersoftware.at/Hilfe/Wie-funktioniert-der-online-Check-In

Then go to:
Settings → Web Booking → Signature

There you can choose whether the signature should be:

visible, or
required as a mandatory field

This allows the guest to provide a digital signature during the online check-in.