The "measure rotation" command makes a rod composed of two atoms and a bond. So commands that work to color and change the size of atoms and bonds will do what you want. Assuming the rod model number is 2 (get model number from Favorites / Model Panel color red #2 setattr a radius 5 #2 setattr b radius 5 #2 These command set the color, atom radius and bond radius. You can also use menus and dialogs. Select an atom (ctrl-click), press up-arrow key to select whole rod, menu Actions / Color / red to color it. Select rod, menu Actions / Inspect, and atom and radius in type in fields. Making the bond longer is a bit more obscure. There is no command that I know of. Use menu Tools / Structure Editing / Build Structure, use the Set Bond Length tab, select the bond, type in a new bond length. It doesn't have a mode where it extends equally in both directions. Instead extend by some in one direction ("move atoms on smaller side"), then extend again in the other direction ("move atoms on larger side"). You can also get this dialog by ctrl-double-click on the bond and choose set bond length. Tom

Hi all,

I have used measure rotation to draw a rod down an axis of symmetry. Does anyone know a way of altering the diameter, length and color of the rod?

Many thanks