We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
You may want to reverse the -dset and -master datasets if you want a finer drawing. You can resample that back down to the lower resolution with 3dresample or 3dfractionize later. Alternatively, you can also open a second AFNI controller and show the ROI dataset you are drawing on as the overlay. That's initially named "COPY_...". Updates in the ROI as you draw are shown in the second controller. Still, the more important question is your goal for doing this.