Are you looking to enhance your Revit 3D view and focus on specific elements in your design? Adding a cut plane can help you achieve this. Here's how you can do it:

Step 1: Open your Revit project and navigate to the 3D view where you want to add the cut plane.

Step 2: In the view control bar, click on the 'View' tab and select 'Visibility/Graphics' or use the shortcut 'VG'.

Step 3: In the Visibility/Graphics dialog box, select the 'Annotation Categories' tab.

Step 4: Scroll down and check the box next to 'Cut Plane' to make it visible in the 3D view.

Step 5: Click 'Apply' and 'OK' to close the dialog box.

Step 6: Now, you should see the cut plane displayed in your 3D view. You can adjust its position and orientation by using the 'Modify|Duct' tool.

Step 7: To adjust the height of the cut plane, go to the properties palette and input the desired elevation value.

Step 8: You can also change the depth and offset of the cut plane to focus on specific sections of your design.

Step 9: Once you're satisfied with the position and settings of the cut plane, you can further customize its appearance by changing the line style, line weight, and color in the Visibility/Graphics dialog box.

By following these steps, you can effectively add a cut plane to your Revit 3D view, allowing you to focus on specific elements or sections in your design. This feature can be particularly useful when presenting your design to clients or stakeholders, as it provides a clear and detailed view of the key elements in your project.

In conclusion, adding a cut plane in Revit 3D view is a valuable tool for enhancing your design presentations and effectively communicating your design intent. With the ability to customize the position, height, and appearance of the cut plane, you can create compelling visualizations that showcase the most important aspects of your project.