In the Views Tab of the Control Panel, there are two settings that can make it easier to navigate in your drawing view if you do not have a mouse and are using a trackpad on your laptop: the view focus point and the navigation bar. In this case, it can also be helpful to know other ways to move, zoom, circle, and pan without having a mouse.

Focus point

When this box is checked, a purple dot will appear in the 3D view. When selected, CET will rotate the view around the focus point. Click anywhere in the drawing to move the focus point. Now the purple dot will be the target you zoom () toward or away from, and will be the center that you circle
() around. 

When deselected, which is the default, CET switches to pointer-based navigation, meaning that any zooming or circling is centered on the position of the cursor on your screen. 

Navigation bar

The navigation bar for the camera in 3D view gives quick access to the Circle Camera around Target, Move camera up or down, and Zoom In or Out features. The panel appears at the bottom of the program window, but the yellow triangles can be used to move the panel to the bottom-right corner, or to temporarily collapse it.

To use the navigation control panel, click and hold the mouse button in one of the windows in the panel, and move the mouse.