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With Preview – a free image utility built into the OS X operating system – resizing images is very simple. Preview helps you crop, resize images easily without installing additional software. Let’s learn how to control image size, remove unwanted areas, and adjust resolution for different uses on Preview.
Steps
Resize image on Preview
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Navigate to the photo that you want to resize. This method helps you to resize the entire image. If you want to crop part of the image to resize it, see the next method.
- To search for an image’s name or tag, open Finder, then click the magnifying glass icon in the menu bar. Type a search term and press ⏎ Return to display the results.
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Drag the image and drop it on the Preview icon in the Dock or Finder. [1] X Research Source The image will open in Preview.
- You can also right-click the photo and select “Open With” and then click “Preview.”
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Click the edit button (square with pencil) to switch to edit mode (Edit Mode). A new toolbar will appear at the top of the Preview window.
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Click the “Tops” menu and choose “Adjust Size”.
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Change resolution. [2] X Research Source Resolution is measured in pixels (pixels) per inch (also known as “dots per inch” or “dpi”). If you plan to print photos or want them to keep the highest possible quality, you need to increase the resolution.
- If you want to use photos on the web or an app like Facebook, the default resolution (72) is medium. If the image has a higher resolution, then when you reduce the size, the file size will be smaller.
- If you want to print photos in a high-quality format, such as advertisements or other business communications, set the resolution to at least 600. Note: the file size will increase significantly. tell.
- If printing on glossy paper, parameter 300 is appropriate. The file size will be much larger than the default 72 dpi resolution, but the final quality will please you.
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Enter the desired width and height in the specified frame. The higher the parameter, the larger the file size will be.
- It is helpful to change the unit of measurement for ease of visualization. For example, you can change it to “cm” if you want to specify the width in centimeters. Click the drop-down box to the right of each item Width and Height to set.
- If desired, you can select the size as a percentage of the current size. Select “Scale”, then select a percentage in the drop-down box.
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Check the box next to “Scale proportionally” so that the image is not out of proportion. [3] X Research Source Although not required, you can use this option to make sure that when you change the width, the height also changes. The image will always keep its original symmetry.
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Click OK to see the image in the new size. If you are not satisfied with the change, you can press ⌘ Cmd + Z to return to the previous action.
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Press ⌘ Command + S to save the changes. After adjusting the image size, don’t forget to save your work.
- If you want to save the image with this new size as a completely different file, click “File,” choose “Save As,” then give the file a name.
- If, after saving, you realize you made a mistake at something, click “Revert To” in the File menu and select “Browse All Versions…”. You can select an earlier version of the image that you want to revert to.
Crop image on Preview
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Click the edit button (square with pencil) to go into edit mode.
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Click the dotted rectangle icon in the editing toolbar, then choose “Rectangular Selection”. [4] X Research Sources
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Click and drag your mouse over the part of the image that you want to keep. After you release the mouse button, a dotted rectangle will appear on the image area.
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Click the Crop button. All parts of the image outside the rectangular selection will be cut off.
- You can resize the crop like any image.
- If not satisfied, press ⌘ Cmd + Z to return.
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Press ⌘ Cmd + S to save the file.
- If you want to save the cropped image area as a completely new file (and keep the original image), click “File”, select “Save As” and give the new file a name.
- If after saving you want to revert to the previous version of the image, click “File”, click “Revert To” and then select “Browse All Versions…” Then you can select an older version of the image. image.
X
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 7,473 times.
With Preview – a free image utility built into the OS X operating system – resizing images is very simple. Preview helps you crop, resize images easily without installing additional software. Let’s learn how to control image size, remove unwanted areas, and adjust resolution for different uses on Preview.
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