Hi Steve, Each Chimera model can be active or inactive. This terminology is a bit confusing. It really means movable or fixed. If you bring up the the Model Panel (under Controllers menu) there is a column of checkbuttons so you can activate or deactivate any of the models. Then mouse actions will only move the active ones. For interactive docking you have to switch back and forth alot between rotating all models and rotating just one. I wrote some Python code for another docker to make Chimera accelerators that do this. I include the python code below. It defines keyboard accelerators 0, 1, 2, 3, 4, 5 which activate model #0, #1, ... only. It also defines and accelerator "aa" that activates all models. To use these bring up the accelerator dialog, menu Extensions/Keyboard/Accelerator List. Then change the accelerator file entry field to give the path to the code below, and press the load button. This will be remembered for you next Chimera session so you won't have to do it again. Then turn on the accelerators with the switch on the accelerator dialog. You may want to use Extensions/Manager, click show start buttons, and click the button to autostart accelerators whenever you start Chimera. For more on Chimera accelerators press the Help button on the Accelerator dialog. It explains how to switch between using Midas commands and accelerators. Tom ---- activate_accel.py follows: # ----------------------------------------------------------------------------- # def register_accelerators(): from Accelerators import standard_accelerators, add_accelerator reload(standard_accelerators) standard_accelerators.register_accelerators() add_accelerator('0', 'Activate model 0 only', lambda: activate_model_n_only(0)) add_accelerator('1', 'Activate model 1 only', lambda: activate_model_n_only(1)) add_accelerator('2', 'Activate model 2 only', lambda: activate_model_n_only(2)) add_accelerator('3', 'Activate model 3 only', lambda: activate_model_n_only(3)) add_accelerator('4', 'Activate model 4 only', lambda: activate_model_n_only(4)) add_accelerator('5', 'Activate model 5 only', lambda: activate_model_n_only(5)) add_accelerator('aa', 'Activate all models', activate_all_models) # ----------------------------------------------------------------------------- # def activate_model_n_only(n): from chimera import openModels for m in openModels.list(all = 1): m.openState.active = (m.id == n) # ----------------------------------------------------------------------------- # def activate_all_models(): from chimera import openModels for m in openModels.list(all = 1): m.openState.active = 1