Virtual components such as spaces and openings are hidden by default. These can be enabled by going toView > Spaces / Openings.
Once enabled they can be shown by selecting elements with type Space or Opening in the model tree, right clicking on them and choose 'Show/hide components', or add them to 'My view'.
Use these hotkeys to show and hide spaces and openings quickly:
ALT/Option + S for spaces
ALT/Option + O for openings
You can also enable or disable the display of spaces and openings by using the show component button in the ribbon.
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