Input Quantizing

Hi Folks...

I noticed that in one of my projects, the midi track says that the input quantize is set to 'quarter'. I than tried to create a new project and when I checked the input quantize for a midi track in that project, I found '0' instead of 'quarter'. How do I actually set the value back to 0 from quarter? When I look in the drop down list, '0' isn't mentioned. Hope someone can advise. Thanks.

regards
Glisando