Dear Smith, You can search the Chimera mailing lists here: <http://www.rbvi.ucsf.edu/chimera/docs/feedback.html> For example, try searching the chimera-users archive for "measure density" and reading the top two hits. 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 Apr 6, 2015, at 8:32 PM, "Smith Liu" <smith_liu123@163.com> wrote:

Dear All,

Will you please tell me the command or process to measure the diameter of the molecule density in the map by chimera?

Smith