How to use the Resize & Adjust Image Preview palette on our Mac

The Preview app on our Mac among its many features allows us to resize images and edit colors, lights, contrasts, etc. We make all these adjustments using two app tool palettes.

The Color Palette

The color palette allows us to adjust exposures, contrasts, shadows, saturations , etc. It also has an automatic option. To make this palette appear we simply choose Adjust color… from the menu Tools in the app. Alternatively we can press Option (?) + Command (?) + C on the keyboard. Let’s see what options it offers us:

  • At the top we can edit the histogram, with its black, white and gray simply by sliding the different elements.
  • Immediately below are automatic settings that are self-explanatory.
  • Below are the lighting tools: Exposure, to increase or decrease the “brightness” of the image; Contrast, to increase or decrease the differentiation between dark and light tones; Highlights, to increase or decrease the brightness of light areas; Shadows, to increase or decrease the brightness of dark areas.
  • Now we find another group of tools, those of color:Saturation, where to increase or to diminish the brightness of the colors.Temperature, where to choose between warm neutral or cold.Hue, to balance according to a white point of the image, that we can select using the selector in form of dropper.Sepia, to give a sepia tone to the image and an old character.
  • The last section allows us to adjust the Sharpness of the image and the definition of the edges of the elements that appear in it.
  • Finally, we found Restore Everything, to start over.

The size palette

How to use the Resize & Adjust Image Preview palette on our Mac
How to use the Resize & Adjust Image Preview palette on our Mac

As the name implies, the size palette allows us to adjust the dimensions of an image as well as its resolution . To access this palette we choose Resize… from the menu Tools in the app. It offers us several options:

  • Fit to, where we can select common size presets such as 1024×1024 or 1920×1920.
  • Width, where we specify the width of our image.
  • Height, where we specify the height.
  • Next to Width and Height we find a selector in which we can choose in which units we want to see both variables: pixels, percent, inches, cm, mm or points.
  • Resolution, to indicate the resolution we want.
  • Again, next to Resolution we find a unit selector where we can choose between: pixel-inch or pixel-cm.
  • Adjust size proportionally, which allows us to choose whether or not to distort the image when resizing it. If this option is activated and we double the height, the width will be adjusted accordingly. On the contrary, if this option is unchecked and we double the height we will end up with a photo where we will look very thin.
  • Sample image, which when deactivated allows us to resize the image without losing details.
  • Below is the size of the resulting image as well as its weight.

When we have finished introducing the new sizes or resolution simply we play Accept .

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Whether we have changed the color or the size of an image, when we have completed the changes we simply close Preview and the file will be automatically saved with the new settings. It’s that simple.

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