Hi Sudheer, Sounds like you want 2D labels (Tools... Utilities... 2D Labels): <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/2dlabels/2dlabels.h...

Since these labels don't move when you rotate the structure, you would first find the position you want to show in your figure, and then add the labels. Alternatively, for labels in 3D that move with the structure, you could just label one atom in each helix and then manually change what is in the label (for example with "Actions... Label... other..."). However, for figures I think 2D labels are much better, since they allow more control over location and can include symbols such as Greek letters, and it is easier to change their sizes and colors. Some example images with 2D labels: <http://www.cgl.ucsf.edu/chimera/feature_highlights/2gbp-bfactor.png> <http://www.cgl.ucsf.edu/chimera/feature_highlights/2fma-density.png> <http://www.cgl.ucsf.edu/chimera/ImageGallery/entries/cavities/cavities-large...

Best, Elaine ----- Elaine C. Meng, Ph.D. meng@cgl.ucsf.edu UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html On Oct 12, 2008, at 12:21 PM, <skmolugu@miners.utep.edu> wrote:

Hi, I was wondering if there is a way in chimera for numbering the helices in the map fitted with coordinates. I Basically wanted to explain the location of helix in the map by means of numbering it, so that it will be easy for me to explain in my paper. thank you very much for your time, sudheer.