* Star
- Rotate the mouse wheel on the meter that shows the reduced scale.
- The meter moves even if dragged up and down with a mouse left button.
- When the scale value increases, the stars are displayed more.

* Nebula and cluster
- When the scale value is reduced most(0 value), neither the nebula nor the cluster are displayed.
- When the scale value is adjusted to 1, only M(Messier) is displayed.
If [M] button is clicked, the scale value immediately becomes 1.
- When the scale value increases, the nebula and the cluster are displayed more.

*EX. Sensitivity---Low

*EX. Sensitivity---High