Note that changing this setting will not change the actual size of your project’s canvas. You’ll notice that when you select an area of your project, the area will be measured in the unit you selected. Here you can select the specific unit used to measure your project’s canvas (I chose Millimeters below.)Ĭlick OK on the right to set your preferences. Under the area labeled Units, click the bar next to Rulers. Next, the Preferences pop-up window will appear. To start, you can set the preferred unit your projects will automatically use by going to the menu at the top and clicking Photoshop > Preferences. How To Change Measurement Preferences In Photoshop Let’s explore how you can change the measurement units to reflect what you need at different points throughout your project. Now the measurement preferences will be updated.Ĭhanging the measurement scale can also be useful if you feel most comfortable working with a specific scale. In the Units setting, choose the measurement type of the ruler and text to Pixels, Inches, Millimetres, Centimetres, Picas, or Points. To change measurement units in Photoshop, go to Photoshop (Mac) or File (PC) > Preferences > Units & Rulers.

For example, some might require you to work in inches or millimeters, while pixels might be best for others. When using Photoshop, you might need to set different measurement scales for different projects. Setting the scale allows you to measure specific areas as you edit so that you can log the calculations you receive. Photoshop’s measurement scale equates the pixels in your image to scale units like inches or millimeters.

How to change sizes in photoshop