Screen Protractor

Easily Measure any Angle on the Screen

Screen Protractor Specifications
To use the Protractor drag the application over the portion of a window you want to measure with the mouse. The center of the Protractor 'bullseye' is see-through so you will be able to exactly align it. To change the angle use the mouse to drag the two sliders. The number in the text box will show the exact angle in degrees.

The Protractor has several buttons which may appear differently on different skins. The arrow buttons will allow you to move and rotate the Protractor to measure any angle.

All the controls can be accessed through the keyboard:

Arrow Keys Move Protractor
Shift + Arrow Keys Extend 1st Slider
Shift + Alt + Arrow Keys Extend 2nd Slider
Ctrl + Arrow Keys Move Protractor by 10
Ctrl + Shift + Arrow Keys Extend 1st Slider by 10
Shift + > Rotate 1st Slider clockwise
Shift + < Rotate 1st Slider counter-clockwise
Shift + Alt + > Rotate 2nd Slider clockwise
Shift + Alt + < Rotate 2nd Slider counter-clockwise
C Cycle 1st Bar Color
K Cycle 2nd Bar Color
F Rotate 1st Slider to nearest 45 degrees
Alt + F Rotate 2nd Slider to nearest 45 degrees
L Rotate 1st Slider to last 45 degrees
Alt + L Rotate 2nd Slider to last 45 degrees
I Swap Angles
S Toggle Sticky Angles
A Toggle Link Angles
N New Protractor
Q Quit
H Hide in For Windows System Tray
F1 Show Help
For Windows Ctrl+C Copy Value to Clipboard
For Windows Ctrl+V Paste Value from Clipboard
Z Undo/Redo Movement
Doubleclick mouse Flip handles between horizontal and vertical
For Windows Right-click mouse Show Protractor menu

While Dragging the Base:

Shift Limit movement to 45 degrees
For Windows Alt Limit movement to 1st Slider
Ctrl Limit movement to 2nd Slider

While Dragging the Slider:

Shift Lock Angle
Alt Lock Measurement
Ctrl Override 'Sticky Angles'

By typing a number and pressing 'Enter' the Protractor will update to measure the new angle. Simple calculations may be performed by typing -, +, *, or / and then a number, then 'Enter'; the Protractor will update to the new relative angle.

When Closed the Protractor sits in the For Windows System Tray

By For Windows Right-clicking anywhere on the face of the Protractor, or clicking on the For Windows System Tray icon the Protractor menu is displayed:

Protractor Menu for Windows

The menu is divided into four sections:

Units Change the scale of measurement
Skins Choose a new user interface
Options Access more options

Additionally there are the options:

Sticky Angles Snap rotation to nearest 45 degrees
Link Angles Link angles together when dragging
Swap Angles Swap the position of the sliders
Exit Close the program

The Units menu allows you to choose a new unit from the list of predefined units.

You may also configure your own Custom Units using the 'Calibrate Units' menu option. Choosing this option will bring up a screen which allows you to choose a Custom Unit, rename and set the scale. You may also set the zero angle, enabling easy relative angles to be calculated.

The Skins menu presents several different choices for the user interface of the Protractor. By choosing the "Get More Skins" menu item you will be taken to the Screen Protractor skin webpage. This allows you to browse and download new skins. Full instructions are given on the webpage.

The Options menu contains a sub menu of the following options:

Stay On Top Controls floating above other windows
Thin Color Bars Toggles thin or thick Color Bars
Show Tooltips Shows/Hides info popups for buttons
Run at Startup Opens Protractor when computer starts
Hide Splash Screen Hides the picture at startup
For Windows Transparency Pops up a slider to control how see-through the application is
For Windows Magnifier Opens the Iconico Screen Magnifier Application
Center On Screen Moves the Protractor to screen center
Help Shows Help
Unlock Application Accepts your serial number
Visit Website Links to Protractor homepage
Configure Custom Units
The Protractor can be configured to measure in the following units:
  • Degrees
  • Radians
  • Revolutions
  • Grads
  • Mils
  • Minutes
  • Seconds
  • Bearing
By clicking the 'Calibrate Units' menu item you can easily define any number of additional units of measurement.

Windows Protractor Calibration Screen

The Protractor use conversion factors to determine the built in units. You can adapt these units and enter your own custom units.

For Windows In version 4.0 for Windows the configuration screen allows you the choice of setting the display to be in fractions, padding the display with blank digits and showing negative angles when measuring angles greater than 180 degrees. Double-clicking in the Unit Format column will show the popup that lets you control these settings.

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