When working on PCB design in Altium, it's important to have a good visualization of your layout in 3D. Rotating the 3D view can help you inspect the layout from different angles and ensure everything is in place. Here's a simple guide on how to rotate the 3D view in Altium:

1. Open the PCB Layout: First, open the PCB layout where you want to rotate the 3D view.

2. Switch to 3D View: In the PCB layout editor, go to the View menu and select the '3D Layout Mode' option to switch to the 3D view.

3. Use the Mouse Controls: Once you are in the 3D view, you can rotate the view using the mouse controls. Hold down the middle mouse button and move the mouse to rotate the view in any direction. You can also use the scroll wheel to zoom in and out for a closer look at specific areas of the layout.

4. Keyboard Shortcuts: Altium also provides keyboard shortcuts for rotating the 3D view. Press and hold the Shift key and the middle mouse button to rotate the view. You can also use the arrow keys on the keyboard to rotate the view in different directions.

5. Reset the View: If you want to reset the view to its default position, you can use the 'Reset 3D View' option in the View menu.

By following these simple steps, you can easily rotate the 3D view in Altium and get a better perspective of your PCB layout. This can help you identify any potential design issues and ensure that the components are placed correctly.

In conclusion, having a clear 3D view of your PCB layout is essential for ensuring the success of your design. With Altium's intuitive tools for 3D visualization, rotating the 3D view is a simple task that can greatly enhance your design process. By following the steps outlined above, you can easily manipulate the 3D view to get the best vantage point for inspecting your layout and making any necessary adjustments.