[Chimera-users] "cutoff" parameter in Find clashes/contacts option

Dear All, I was unsuccessfully looking for the explanation to what exactly "cutoff" parameter means. I'm using the Find clashes/contacts option to identify the contacts and not clashes, by assigning the default values of -0.4A and 0.0 to "cutoff" and "allowance" parameters. However, I do not understand how it is used. I would very much grateful for the information, since I also want to include it in my dissertation. Best regards, Anna Feldman-Salit