Trilithon Protractors Description:

Five measurement units: degrees (360 gradations per circle), grads
(400 gradations per circle), mils (6,400 gradations per circle), Radians (two Pi gradations per circle), and Compass Rose

Direction of Measurement widdershins (anti-clockwise) or deasil
(clockwise)

Zero point can be set to multiples of 30 and 45 for degrees
protractor, to multiples of 50 grads for grads protractor, and to
multiples of 800 mils for mils protractor

Real Time Tracking Lines follow the mouse

Real Time Angle Display for the Degree, Grad, Mil, and Radian Protractor;
Real Time Bearing and Reciprocal Bearing for the Compass Protractor.

Real Time Sine and Cosine readouts for the Degree, Grad, Mil, and Radian Protractor;
Real Time Radian Display for the Degree, Grad, and Mil Protractor;
Real Time Degree Display for the Radian Protractor;

Protractors are Moveable via the Mouse or via the Arrow Keys

Protractors are made Partially Transparent when Moving

Opacity control Protractors can be dimmed down so you can see
through them

Protractors Stay On Top of other applications, and additionally,
continue to track the mouse even when another application is the
active application

Protractor Settings are Remembered between sessions

The Background Colour of the Protractors is selectable from the
Colour Menu. Background Colour of the Protractors includes
Light Metal or Dark Metal

Transparency of the Protractors is set from the Opacity Menu.
An option in the Opacity Menu selects whether
the protractors turn partially transparent when they are being
moved

You can set the protractor origin (its centre) to the current mouse
location. Simply move the mouse to any position on the screen and
type command O, without clicking the mouse first, and the protractor
centre is placed at the mouse location.

command C copies the current angle to the clipboard