KB shortcut to disable the touchpad

[Thomas Blasejewicz]

Good evening
Sorry for bothering everybody so frequently.

I have a Dell Vostro 3500(?). That thing has a key combination to
temporarily disable the touchpad:
Fn + F6.

The two machines I am currently using to "practice Linux" (Mouse
Computer TW9 / Dell Inspiron 1545)
apparently do NOT have such keys.
I know I can disable the touchpad via "Settings", but ...
it would be REALLY nice, if it were possible to assign a KB shortcut to
that operation.

IS that posssible?
If so, how is it achieved?

Thank you in advance