Games

Angle Snapping Test - Detect Mouse Line Correction

Draw lines and detect whether your mouse applies angle snapping (prediction/line straightening).

Angle Snapping Detection

In the area below, draw a horizontal line as straight as you can. If angle snapping is enabled, the line will come out unnaturally straight.

Natural stroke

Stroke suspected of line correction

Guideline (while drawing)

What Is Angle Snapping?

Angle snapping is a correction that automatically straightens slightly curved mouse movements. It also goes by line correction or prediction.

For drawing clean straight lines it's convenient — but in games it's a problem. The micro-adjustments you make deliberately get classified as wobble and erased, so your aim lands subtly off where you placed it.

This tool lets you draw slow wavy lines and check whether they're being unnaturally straightened.

What Correction Looks Like

If you drew a wave but the result comes out as stair-steps or a straight line, correction is likely at work. Gentle curves turning into chains of straight segments is the same signature.

Conversely, if your smooth curves come out exactly as drawn, you can assume no correction is active.

How to Disable Angle Snapping

Open your mouse's companion software and look for a line correction / angle snapping toggle
Some models have no visible setting and correct permanently at the firmware level — nothing to change there
A different mousepad can change behavior; glossy or coarse-weave surfaces confuse some sensors
The OS "Enhance pointer precision" setting also alters movement by speed — gamers generally leave it off

Browser-based detection also depends on your mousepad surface and sensor tracking. If the verdict is unclear, vary your drawing speed and test a few more times.

Frequently Asked Questions

Q. What is angle snapping (line straightening)?

A. A correction that turns near-straight mouse movements into perfectly straight lines. Handy for drawing and some business software, but a nuisance for FPS aim — which is why most gaming mice ship with it off.

Q. What is the problem with having it on?

A. In FPS games, your fine angle adjustments get cancelled by the correction, making your aim move in stiff straight lines. Tracking and micro-adjustments stop working properly, which can hold back your improvement.

Q. How do I turn it off?

A. In your gaming mouse software (Logitech G HUB / Razer Synapse / SteelSeries GG, etc.), find the setting labeled Angle Snapping or Prediction and switch it off. Windows' standard mouse settings do not include this feature.

Q. How do I read the results?

A. If you deliberately drew slanted or curved strokes but the recorded traces come out straight, horizontal, or vertical, correction is likely active. If the traces follow your hand faithfully, it is off.

What Is Angle Snapping (Line Correction)?

Angle snapping is a feature of a mouse's firmware or driver that automatically straightens the cursor trajectory. It is also known as Prediction.

For everyday PC use it has the advantage of drawing clean lines, but in FPS games it erases your subtle aim adjustments, so most gamers recommend turning it off.

How to Test

On the canvas, try to draw a horizontal line as straight as you can
Human hands cannot draw a perfect line, so natural wobble is normal
With angle snapping ON, the wobble drops to near zero and lines look unnaturally straight
Draw 2-3 strokes and a verdict will appear

Detection Criteria

Mean deviation under 0.8px — angle snapping detected (likely)
Mean deviation 0.8-1.8px — somewhat straight (possible light correction)
Mean deviation 1.8px or more — natural strokes (no correction)

How to Turn Off Angle Snapping

Check the settings in your mouse driver software (Logitech G HUB, Razer Synapse, etc.)
Turn off the item labeled "Angle Snapping", "Prediction", or "Line Correction"
On some mice the behavior is fixed at the firmware level and cannot be changed

* Because this samples browser cursor coordinates, results are affected by OS settings, DPI, and polling rate. It works best for before/after comparisons in the same environment.