Hi Pior, 
 
re: 
> Is the custom Cplane feature (as run like in this script) always tied to all views, or can it be related to 
> the perspective view only, leaving the other (orthos) unaffected ? 
 
It can be set just for the  3D view without changing the ortho views. Try this: 
 
script:/* Orient cplane to 3D view direction, origin on selected objects */ var frame = moi.ui.mainWindow.viewpanel.getViewport('3D').targetFrame; frame.origin = moi.view.getCPlane().origin; var objs = moi.geometryDatabase.getSelectedObjects(); if ( objs.length > 0 ) {  frame.origin = objs.getHighAccuracyBoundingBox().center; } moi.view.setCPlane( frame, false /*ApplyToAllViews*/ ); 
 
     - Michael 
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