The most important one you want to have selected is “active section planes.” This will allow you to switch back and forth between what you’re seeing.

Below the scene thumbnails, there are a lot of options you can select. To open the “scenes” tab, go to “window” > “default tray” and select “scenes.” In the “scenes” tab, click on the “+” to add a scene. If you plan on making a lot of sections, you may want to create separate scenes for each view. Click on a point somewhere in the center of your model while holding the “right” arrow key. For example, “up” locks to the blue axis, “right” locks to the red axis, and “left” locks to the green axis. You can use your arrow keys to lock to a certain axis to make sure you have a straight cut. When you move your mouse around your model you will notice the plane shift based on whatever plane you mouseover. Type in a name and symbol for your section and hit “enter.” Before you begin placing sections in Sketchup, it’s important to think about naming them in a way that makes sense for your model. Click on the “section plane” icon to open the “place section plane” window. If you don’t have this toolbar simply right-click in a white space and select “large tool set.” Alternatively, you can go to “tools” and select “section plane” if you don’t want to add the toolbar. On the left side of your screen, there is a toolbar with some section tools. Navigate to “view” and select “section planes” so that it is checked. Once you have your model open, the first step is to make sure your section planes are turned on.

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