I improved the mouse mode for moving selected atoms so if no atoms are selected it moves everything like the normal rotation and translation mouse modes -- all active models are moved. The new code is http://www.cgl.ucsf.edu/home/goddard/temp/moveselection.tar For installation instructions see my previous chimera-users message. http://www.cgl.ucsf.edu/pipermail/chimera-users/2005-December/000609.html The new behaviour makes it easy to move some atoms, then rotate the view, then move the atoms again. After moving the atoms you can clear the selection using ctrl-click on the background of the graphics window, then rotate everything to the new view point, then press the left arrow key (undo selection) to revert to the previous selection, and continue moving the atoms. Tom