To switch to 3D view in AutoCAD, follow these simple steps:

Step 1: Open your AutoCAD software and load the desired 2D drawing that you want to switch to 3D view.

Step 2: Once the drawing is loaded, navigate to the 'View' tab on the top menu bar.

Step 3: In the 'View' tab, locate the '3D Views' panel. Click on the dropdown menu to display the available 3D view options.

Step 4: Choose the appropriate 3D view from the dropdown menu. Options may include isometric, perspective, or custom 3D views.

Step 5: After selecting the desired 3D view, your drawing will automatically switch to the chosen 3D perspective.

Switching to 3D view in AutoCAD enables you to visualize your 2D designs in a more realistic and immersive manner. This feature allows for better assessment of spatial relationships and proportion, which is crucial in architectural, engineering, and construction projects. By following these simple steps, you can seamlessly transition between 2D and 3D views to improve your CAD design experience and workflow.