Dear Smith, In the Volume Viewer dialog’s menu, choose Features… Coordinates. This will show the origin and voxel size in the dialog, and also allow you to change them if needed. <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/volumeviewer/volumeviewer.html#coordinates> I hope this helps, Elaine ---------- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco

On Aug 24, 2015, at 6:49 PM, Smith Liu <smith_liu123@163.com> wrote:

Dear All, Will you please tell me by Chimera how can we know the voxel size measured in angstroms? Smith