Viewport

The viewport is the main Composer Player pane.

It displays the 3D scene, which is the stage for all Composer actors (geometry, collaboration, camera, lighting, and so on). You can change viewport properties. See Viewport.

The compass in the upper-right corner of the viewport lets you select standard orthographic camera views. The red, green, and blue axes indicate the X, Y, and Z directions, respectively. Clicking faces or axes of the compass rotates the model to that location: left, right, front, back, top, bottom. As you rotate the model, the compass rotates as well.