You can adjust the viewing angle and position in the geometry window using the view tools on the toolbar.
Initially, the geometry window is in Rotate mode, and you can rotate the view by dragging the mouse in the window while holding down the left mouse button. Clicking on the Pan toolbar button changes the behavior so that dragging slides the viewpoint from side to side. The button for the active mode is highlighted on the toolbar, and the cursor in the window will also match the mode icon.
You can zoom in to see details on the workpiece by clicking on the Zoom In button or by typing Ctl-Up. You can zoom out to see more of workpiece by clicking on the Zoom Out button or by typing Ctl-Down. The Zoom All button adjusts the view position and zoom level so that the entire part is centered and fits in the window. Finally, the Center On Tool button adjusts the display so that the current toolpath position is centered in the window.
The other modes on the toolbar are for selecting geometric items. Depending on the mode, left click of the mouse will Pick Bodies, Pick Faces, or Pick Edges. The last mode is used to Move Tool to a new location by picking a point on a toolpath.
The Views toolbar menu has a list of predefined views, so that you can quickly align the geometry display to coordinate axes. The Top and Bottom views align the display to the Z axis. The Front and Back views align the display to the X axis. The Left and Right views align the display to the Y axis. Finally, the Isometric view aligns the view so that the angle between the projection of any two of the coordinate axes is drawn as 120°
In addition, you can choose whether you would like things displayed using a Perspective or Orthographic drawing style. With the perspective drawing style, parallel lines appear to converge in the distance, while in an orthographic style, they remain parallel. The orthographic style makes it easier to visually compare the size of things at different distances from your viewing location.