Creating a 3D plan view in Archicad can add depth and dimension to your architectural designs. Here are the steps to achieve this:

1. Start by opening your Archicad software and selecting the plan view you want to work with.

2. Next, navigate to the Viewpoint menu and choose the 3D Projection option.

3. Adjust the settings to ensure that the 3D projection accurately represents your plan view. You can customize the camera angle, height, and perspective to achieve the desired result.

4. Once you are satisfied with the settings, select the Generate 3D Projection option to create the 3D plan view.

5. You can further enhance the 3D plan view by adding textures, materials, and lighting effects to make it more realistic and visually appealing.

By following these steps, you can easily create a stunning 3D plan view in Archicad to showcase your architectural designs in a dynamic and immersive way.