Switch between the 2D plan, the 3D model, and a side-by-side split view.
Plant Room Studio shows the same layout three ways. Switch with the view control in the status bar, or press V to cycle 2D ↔ 3D.
The plan is where you build: draw the room, place and rotate equipment, add dimensions and sections, and read validation. It's a top-down millimetre-accurate view with a grid you can show (Shift+G) and snap to (G).
The 3D view builds a model from the same placements — room shell, columns, doors, and each equipment item at its footprint, height, and mount elevation. Use it to check heights, mounting, and how equipment reads in the space. Editing is done in 2D; the 3D view reflects your current layout. See Working in 3D for navigation, measuring, viewpoints, section planes, and display options.
Split shows the 2D plan and 3D model side by side, so you can edit in plan and watch the model update at the same time.
On a phone or narrow window the tool opens as a read-only viewer: you can open a saved project and use the views, but editing is disabled. Build layouts on a desktop-width screen.
When the layout looks right, move on to Exporting.