How to Measure Angles in Photoshop?

To measure angles in Photoshop using the method described, you primarily use the Alt key in conjunction with a drawing action. This technique is specifically for measuring angles created by points you define within your image.

Here are the steps based on the provided reference:

Using the Alt Key for Angle Measurement

This method allows you to define an angle by drawing two lines from a common point.

Step-by-Step Process

1. Select the Tool: While the reference doesn't explicitly name the tool, this action is commonly performed with the Ruler Tool (nested under the Eyedropper Tool in the Tools panel). Select this tool first.
2. Define the First Line: Click and drag with the tool to draw the first line of your angle.
3. Hold the Alt Key: After drawing the first line, hold down the Alt key (or Option key on macOS).
4. Observe the Cursor Change: As stated in the reference, while holding Alt, "you would see that the cursor kind of changes to an angle" symbol.
5. Define the Second Line: While still holding the Alt key down, click and drag from one endpoint of your first line (this becomes the angle's vertex) to draw the second line of the angle.
6. View the Measurement: Once the second line is drawn, the angle measurement will typically appear in the Info panel (Window > Info).

By holding the Alt key and drawing a second line from the end of the first, you pivot the tool to measure the angle between the two lines you've created.

This simple keyboard modifier (Alt) is key to switching the tool's function from drawing a single line to defining and measuring an angle between two intersecting lines.