Q:Dear all, I have some very large volumes of 0.2mm resolution that I would like to hand-segment under Display, and I was wondering if there is a means of running it or compiling it in a manner that minimizes the lag related to processing such large volumes.

Any suggestions, beyond cropping?
http://www.bic.mni.mcgill.ca/pipermail/minc-users/2008-September/002188.html

A: at the shell, try

setenv VOLUME_CACHE_THRESHOLD −1

you should then be able to load in the entire volume without swapping, if you have enough memory on your machine. Display and register both had some kind of internal limit to the amount of memory used. An SGI throwback perhaps?