MoI commands / scripts you couldn't live without, and why

 From:  coi (MARCO)
9041.6 
All time favourite

MaximizeViewport – switches viewport under the current mouse cursor location between respective split and top(bottom)/front(back)/right(left)/3D view.
quote:
Space=script:if ( moi.ui.mainWindow.viewpanel.mode != 'split' ) { moi.ui.mainWindow.viewpanel.mode = 'split' } else { var viewport = moi.ui.getViewportUnderMouse(); if ( viewport ) viewport.viewpanel.mode = viewport.name; }