You use the Forward tool to change the magnification of the model by increasing or decreasing the distance between the current point of view and the pivot point.
The distance that you can move forward or backward is limited by the position of the pivot point.
The Drag Distance indicator lets you adjust the distance between the current point of view and the pivot point. The Drag Distance indicator has two marks on it that show the start and destination distances from the current point of view. The current traveled distance is shown by the orange position indicator. Sliding the indicator forward or backwards increases or decreases the distance to the pivot point.
To reorient a view by moving towards or away from the model
The Drag Distance indicator is displayed.