Mouse Modes

Zoom (F2)

Press Adjust down over the view canvas, and then, keeping the button down, move the mouse upwards to zoom in, and downwards to zoom out.

This changes the perspective angle, or the view scale in parallel views. It does not change the eye point or the view direction. Use Ctrl or Shift to speed up or slow down.

Pan (F3)

Press Adjust over the canvas, and then, keeping the button down, move in any direction to shift the line of sight in that direction. The current view direction is not changed.

Note that the picture moves the opposite way to the mouse movement; it is the observer that is being moved.

It may be useful to think of moving the mouse towards the part of the picture you want to see. Use Ctrl or Shift to speed up or slow down.

Rotate (F5)

Press Adjust and keep it down, then move left/right to change the bearing of the view direction, or up/down to change the elevation.

The initial movement of the mouse determines which is changed, and only that component of the view direction is modified.

To modify the other component, the mouse button must be released and then pressed down again, while moving in the other direction.

Walk (F6)

Press Adjust button and keep it down, then move up to walk forwards, or down to walk backwards, along the line of sight. Use Ctrl or Shift to speed up or slow down.

Eye (F7)

View rotations keep the from- point fixed, and in Model mode rotations keep the through-point fixed. Use Ctrl or Shift to speed up or slow down.