How Do You Measure In Photoshop

Ruler tool

The ruler tool lets you measure out distances and angles in an image. To draw a measuring line, make sure the Info panel and/or ruler tool options bar are visible and click and drag with the ruler tool in an image document window. Later on yous have dragged the ruler tool to make a measurement, the measurement units will appear in the ruler options bar like the instance shown below in Effigy ane. You can then click on the Articulate button to clear the current ruler measurement.

Figure 1 Hither is a view of the ruler tool options bar where I made a measurement with the ruler tool. The x y readouts indicate the start indicate coordinates for the ruler tool measurement and the W and H readouts betoken the width and height of the ruler measurement. The units displayed here utilize whatever units are currently set for the ruler preferences. Notation that the 'Use Measurement Scale' pick is only bachelor in the extended version of Photoshop.

Figure 2 Here is some other view of the ruler tool options panel for the Extended version of Photoshop. In the example shown here the 'Use Measurement Scale' choice was checked. In this fashion, the ruler tool displays the measurement units using the Measurement Scale settings. This tin can be accessed by going to the Image menu and choosing Analysis Set Measurement Calibration Custom… You can apply this dialog to create a custom measurement scale setting where logical unit lengths tin exist given a name such equally inches or pixels and you can gear up the pixel length for each unit of the logical calibration. In the example shown hither, I created a setting where 10 pixels equaled a ane cm unit of length.

Protractor mode

The ruler tool too has a protractor mode. After cartoon a measuring line, Pick/Alt-click on one of the terminate points and drag out a 2nd measuring line. Equally you lot drag this out, the angle measurements are updated in the ruler tool options bar and Info panel. Note that the ruler tool line only remains visible when the tool is selected (or y'all can hibernate it with the View Hide Extras command). The ruler tool line can be updated at any fourth dimension past clicking and dragging any of the end points. And as with other tools, the ruler tool can exist made to snap to the grid or guides.

Straightening images

With previous versions of Photoshop, the ruler tool could be used to mensurate the angle of say, an horizon in a photo and use this measured angle to rotate the epitome choosing Image Image Rotation Arbitrary. You tin can nevertheless use this method if yous wish, but it is now much easier to just select the straighten tool from the crop tool Options bar, equally described below.

Straightening images using the crop tool

To apply a precise image rotation, y'all can click to select the straighten tool from the crop tool options bar and drag beyond the image as shown below in Figure 3.

Figure 3 When an image is opened upward in Photoshop, you may discover that it is not perfectly aligned. If an image doesn't appear to be perfectly aligned, click on the Straighten push in the crop tool Options bar and drag forth what should be a vertical or horizontal edge in the photograph. This will rotate the image so that it appears to be perfectly level.

Straighening a layer

Alternatively, if y'all wish to rotate an private layer, make the layer active, select the ruler tool and drag to define the border you wish to appear straight. Then click the Straighten Layer push in the ruler tool Options bar (see Figure 4) to straighten.

Figure 4 To straighten a layer, select the ruler tool and again, drag to ascertain the edge that should exist straight. Then in the ruler tool Options bar click on the Straighten layer button to straighten the selected layer.

Source: http://www.photoshopforphotographers.com/CC_2013/Help_guide/tp/Measure_tool.html

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