Stop in /usr/ports/... error code 1

[zigniew szalbot]

Hi,

I sometimes make a mistake of selecting wrong options while installing
port software which ends in a port not being installed. I never know how
to undo it in order to start again from the options selection. I try "make
clean" but that does not fix the issue and I cannot get a given port
installed.

What is the procedure to delete initial choice of settings to start afresh?

Thank you very much in advance!

Zbigniew Szalbot