## View

It operates the viewpoint on 3D screen.

If what point the viewpoint is showing becomes unclear, please initialize in menu [View] [Set view].

### Rotate

It rotates the viewpoint.

The center of rotation changes according to Center of rotation in Configuration.

You can set up in Configuration when you want to rotate 360 degrees up and down freely. And you can also change the type of rotation like a trackball in the configuration.

You can rotate by dragging a mouse with pressing the right button on 3D image without selecting this command at default setting.

### Move

It moves the viewpoint.

If you use 3 button mouse, you can move by dragging a mouse with pressing the middle button on 3D image without selecting this command at default setting.

### Zoom

It can zoom in and out by moving a mouse up and down.

You can zoom in by dragging a mouse with pressing both the right and the left buttons on 3D image without selecting this command at default setting.

### Perspective

It change the viewing angle.

### Dolly

It changes the distance between the eye position and the fixation point without changing the viewing angle.