Trilithon Protractors Trilithon Software Software for the Macintosh MillenniumSM . . . 
Protractors Help    
Trilithon Protractors
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Trilithon Protractors Help

Trilithon Protractors is a new and innovative screen protractors application written specifically for Macintosh OS X.

When you launch Protractors, the protractor appears on the screen as shown here

Protractors At Launch

The screen display shows the protractor. The angle tracking lines are visible as the red and green lines

Facets of Protractors' behaviour are controlled in two ways. Some controls are on the faces of the protractors themselves. Other controls are in the Protractor's application menus.

The simplest on-protractor control is the ability to move the protractor around on the screen. When the protractor is moving, it turns partially transparent so you can see through for more accurate positioning — this behaviour is selectable via the Opacity menu.

Move the Protractor either by dragging it around with the mouse, or by pressing the Arrow Keys on the keyboard. When using the Arrow Keys, pressing the Shift Key multiplies the movement amount by ten

As you move the mouse around the screen, four angle tracking lines follow the mouse around to help you with precise positioning and alignment. The red line follows the position of the mouse. The three green lines provide the opposite and perpendicular angles. Angle Displays appears on the protractor and provides real-time interactive tracking of the mouse angle. On most of the scales, the sine and cosine of the angle are also displayed

Follow the On Protractors Controls list for those controls that are on the protractor face. Follow the Menus list for those controls available from the application pull-down menus.

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