Screen Divider

Geometry, alignment, analysis tool and on-screen measurements

More than an on-screen ruler

Version 1.7

Those of us who perform a lot of drafting and design work understand that the most important factor, above all else, is accuracy! Back when most of the design work was done in hardcopy, it was easy enough to find yourself bent over a schematic, carefully measuring and comparing to make certain that everything was precise. It’s interesting to think how computers have transformed the way we approach this task, bringing new tools and capabilities to help us maintain that same level of precision.

Screen Divider Box Shot

Traditional measurement tools such as rulers and protractors aren’t designed for use directly on a computer display, making precise on-screen measurements a challenge. That’s why Screen Divider was developed—to provide a reliable way to measure distances, Cobb angles, and verify parallel lines on any image or schematic displayed on your computer screen.

Screen Divider provides an efficient solution for designers working with digital renderings, making it quick and convenient to conduct length, width, and angle measurements directly on screen—without the need to print a hardcopy.

Screen Divider puts a convenient, versatile measuring tool right on your computer screen. The fully configurable overlay is controlled entirely with your mouse, giving you an intuitive way to adjust divider-line width and achieve precise, evenly spaced on-screen elements. Add a second divider to calculate Cobb angles, or use Screen Divider to easily verify that two lines are perfectly parallel.

Combine these capabilities with Screen Divider’s ability to measure the distance between any two points on your screen, measure the angle between any two lines, and determine the angle of any line relative to the horizontal, and you have a versatile measurement tool that can become an essential part of your development toolkit.

Measure and analyze graphs
Screen Divider can also be used to measure and analyze graphs directly on your screen, making it easy to compare distances, angles, slopes, and other graphical elements without printing the graph.

Analyze Perspective and Vanishing Points
Screen Divider can help you analyze perspective in images and drawings by providing tools for working with lines that converge toward a vanishing point. This can be useful when studying perspective, composition, technical drawings, and digital images.

Measure Spinal Curvature - Measure the Cobb Angle
Screen Divider's adjustable lines make it easier to measure the Cobb angle on X-ray images

More than an on-screen ruler
Screen Divider is more than a simple ruler or protractor. It is a versatile on-screen measurement and geometry tool that lets you measure distances and angles, check parallel lines, analyze graphs and shapes, and work with perspective directly on your computer screen.

Screen Divider includes a variety of specialized modes that make it useful for more than basic distance and angle measurements. Depending on what you are working with, you can use different divider modes for common-point measurements, parallel lines, ascending and descending lines, vanishing points, shapes, and images.

Multiple Divider Modes
Screen Divider offers over 25 working modes that transform it from a simple on-screen measuring tool into a versatile instrument for geometry, alignment, and visual analysis. Depending on your task, you can create lines that share a common point, compare parallel lines, work with ascending or descending lines, analyze vanishing points, and examine geometric shapes and images. You can also work with circles and ellipses, rotate shapes and images, and customize the appearance of the divider to suit your needs.

Click here to watch this demonstration and see the different working modes in action! plays as an animated Gif.

Analyze and Rotate Ellipses
Use Screen Divider with ellipses to examine their orientation and alignment directly on screen. You can also use Screen Divider to rotate ellipses.

Common Point Mode
Bring measurement lines together at a common point to compare their directions and examine angles. This mode is useful for geometry, technical drawings, and analyzing intersecting lines. Screen Divider Ellipse Mode

For the Common Point Mode, please notice the two images below showing two Common Point Regular Mode and Common Point With Line on Top Mode

Parallel Line Modes
Display and compare parallel lines to check alignment, spacing, and orientation. Use these modes when examining technical drawings, diagrams, graphs, or other visual material where parallelism matters.

Ascending and Descending Line Modes
Work with lines in ascending or descending arrangements to compare slopes and orientations. These configurations are useful for examining graphs, geometric patterns, and lines in drawings or images. Screen Divider Parallel Mode

Screen Divider Ascending and Descending Mode

For the Parallel Line Modes, please notice the two images below showing this mode in action.

Work with Shapes and Images
Go beyond straight-line measurements by working with geometric shapes and images directly on your screen. Load images, examine circles and ellipses, and rotate supported shapes or images to investigate their orientation and alignment.

Work with Images
Load an image into Screen Divider and use the divider controls to examine and adjust its orientation directly on your screen.

Screen Shapes
Display and work with geometric shapes such as circles and ellipses directly on your screen. Notice the animations below showing the Screen Divider circle mode as well as the Screen Divider circle path and line splitter modes:

Screen Divider Circles Mode

Screen Divider Circle Path and Line Splitter Modes

Screen Divider can be useful for:

designers and drafters working with digital drawings
engineers and technical professionals working with schematics
architects and others working with plans and perspective drawings
students and teachers working with geometry and graphs
anyone who needs to measure distances or angles in an image displayed on a computer
anyone who needs to compare alignment, spacing, or parallel lines on screen

Using Screen Divider you can do the following:

Measure any distance between any two points
Measure the angle any line makes with the horizontal
Measure the Cobb angle
Measure the angle between any two lines (using two Screen Dividers)
Define and use your own measurement units.
Spread the Screen Divider arms (lines)
As a parallel tool to see if two or more lines are the same
Choose from 25 working modes
Make the Screen Divider clickthrough-able
Set the transparency of the Screen Divider

Key Takeaway

measure distances between any two points on the canvas
measure angles between two lines
measure the angle of any line relative to the horizontal
measure the Cobb angle
define your own measurement units

Click here to read the Frequently Asked Questions!

Here is what ChatGPT says you can do with the Screen Divider application:

Measure the distance between any two points on your screen.
Measure the angle that any line makes with the horizontal.
Measure the angle between any two lines.
Measure Cobb angles.
Use two Screen Dividers to measure angles between two lines.
Check whether two or more lines are perfectly parallel.
Compare the alignment of lines and other elements displayed on your screen.
Measure lengths and widths directly on digital images, drawings, schematics and designs.
Measure distances and angles without printing the image or schematic.
Use Screen Divider when working with digital renderings.
Use Screen Divider as an on-screen measuring tool for drafting and design work.
Use the Screen Divider arms as visual guides for comparing distances and alignment.
Spread the Screen Divider arms to measure larger distances.
Adjust the Screen Divider to suit the distance or angle you want to measure.
Define your own measurement units.
Choose from 25 different working modes.
Use Screen Divider to measure angles in triangles and other geometric shapes.
Use Screen Divider to help analyze graphs and other graphical information.
Use Screen Divider to check parallel lines in drawings, designs and schematics.
Use Screen Divider to help determine vanishing points and analyze perspective.
Use Screen Divider when working with digital images without needing to create a hardcopy.
Adjust the transparency of the Screen Divider so the image underneath remains visible.
Make the Screen Divider click-through-able when you need to interact with the image or application underneath it.
Use Screen Divider as a convenient alternative to physical rulers and protractors when working on a computer.
Quickly perform measurements directly on your computer screen while keeping your original image or design visible.
Use Screen Divider as a precision tool for drafting, design, engineering and other work where accurate on-screen measurements are important.

Screen Divider runs on Windows XP, Vista, 7, 8/8.1, 10, and 11, in both 32-bit and 64-bit versions.

You may download the feature-limited trial and evaluate the software for as long as you need
.NET Framework required
✔ The software is licensed per computer
✔ Free lifetime upgrades
✔ Free technical support via email
✔ Feature-limited trial available
The registration code will be sent by email after your purchase is confirmed
A license is only $19.50

Purchase Screen Divider:
Buy via FastSpring at 50% off:

Buy via BitsDuJour at 50% off:

Download the Screen Divider application - Version 1.7

Screen Divider Screenshots and Videos:

Frequently Asked Questions About Screen Divider

What can I measure with Screen Divider?

Screen Divider lets you measure distances between points, angles between lines, and the angle of a line relative to the horizontal. It can also help you examine parallel lines, geometric shapes, graphs, and perspective.

Can I use Screen Divider with images and drawings?

Yes. You can position the divider over on-screen content and use its measurement and alignment tools without printing the material.

Can I customize the measurement units?

Yes. Screen Divider lets you define your own measurement units, making it useful for different measurement and comparison tasks.

Does Screen Divider support different working modes?

Yes. Screen Divider provides more than 25 working modes for different tasks, including common-point measurements, parallel lines, ascending and descending lines, and geometric shapes.

Can I try Screen Divider before purchasing it?

Yes. A feature-limited trial is available so you can explore the application and evaluate its functionality before purchasing a license.

Can Screen Divider measure the Cobb angle?

Yes. Screen Divider can be used to measure the Cobb angle on displayed spinal X-ray images by positioning its measurement lines along the relevant vertebral endplates. The measurement is an aid and does not replace professional clinical assessment.

Can I measure angles directly on my computer screen?

Yes. You can position and adjust the divider lines over the content displayed on your screen to examine angles without printing the image or drawing.

Can I use Screen Divider to check whether lines are parallel?

Yes. The available working modes let you position and compare lines to examine parallelism, alignment, and their relative directions.

Can Screen Divider help with perspective analysis?

Yes. Its working modes can help you examine converging lines, vanishing points, and perspective relationships in photographs, drawings, and other visual material.

Can I use Screen Divider while working in another application?

Yes. Screen Divider is designed to work as an on-screen overlay, allowing you to position the divider over content displayed in other applications. Its transparency and click-through capabilities can help you work with the underlying content.

Can I adjust the transparency of the divider?

Yes. The transparency settings let you adjust how clearly the underlying image, drawing, or other content remains visible while you use the divider.

Do I need to print an image to measure it?

No. You can perform measurements directly over content displayed on your computer screen, which can save time and avoid unnecessary printing.

Is Screen Divider useful for students and teachers?

Yes. It can help with geometry, trigonometry, graphs, technical drawings, angles, and other visual measurement exercises, making it a useful supplementary tool for learning and demonstrations.

Can Screen Divider be useful for architects, engineers, and designers?

Yes. It can help you inspect line orientations, angles, alignments, proportions, and perspective in technical drawings, plans, illustrations, and other on-screen material.

Does Screen Divider require specialized measurement equipment?

No additional physical measuring instrument is required for its on-screen measurement functions. The application provides adjustable measurement guides that you position over the content you want to examine.

What does a Screen Divider license include?

Please refer to the licensing and purchasing information on this page for the current license terms, technical support arrangements, and upgrade policy.

How can I purchase Screen Divider?

You can purchase a license using one of the purchase options provided on this page. Check the displayed price and license terms before completing your order.

Go To Top