Change from fixed to dynamic IP

[Erik van der Meulen <e.van.der.meulen@avondel.nl>]

Dear Group, on installation of a Debian Potato system, I get the
question if I need a fixed or dynamic (DHCP) IP address.
I would like to change a system with fixed to dynamic. The initial
script that asked about this I cannot find.
My question is: can I rerun that script or can I manually change to
dynamic IP addressing? In case of the latter, pointer that would help me
do that would be most welcomed!

Kind regards.

--
  Erik van der Meulen <e.van.der.meulen@avondel.nl>