3DS MAX – Micro Reference Manual – Freeze Objects
LAYERS
Main Top Menu> Tools> Manage Layers> Freeze
Main Toolbar> Tools> Manage Layers> Freeze
SCHEMATIC VIEW
Main Toolbar> Schematic View> LMB to select Object> Edit> Object Properties…> General> Interactivity> Freeze
VIEWPORT
LMB to select Object> RMB> Object Properties> General> Interactivity> Freeze
RIGHT COLUMN
Display>Freeze