Manually changing the size of a picture involves using image editing software to specify new dimensions or resolution for the image. One common method, especially on macOS, is using the built-in Preview application.
Resizing a Picture Manually Using Preview (macOS)
Using Preview on your Mac is a straightforward way to adjust the dimensions of your image file. This process allows you to make an image larger or smaller as needed for printing, web use, or storage.
Here are the steps to manually resize a picture using Preview:
Steps to Resize
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Open the image in Preview.
- Simply double-click the image file.
- Alternatively, if your default image program has been changed, right-click on the image file, point to Open With, and then select Preview.
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Once the image is open, go to the menu bar at the top of the screen. Click on Tools.
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From the dropdown menu, select Adjust Size....
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Selecting "Adjust Size" will bring up the Resize dialog box. This window provides options to change the image's dimensions, resolution, and fit, allowing you to manually input your desired size.
The Resize dialog box provides various options, such as specifying dimensions in pixels, inches, centimeters, or percentage. You can also adjust the resolution (DPI/PPI). Ensure that the "Scale proportionally" option is checked to maintain the image's aspect ratio unless you specifically want to stretch or compress it.
Here's a quick summary of the Preview steps:
| Step | Action | Menu/Selection | Result |
|---|---|---|---|
| 1 | Open Image | Double-click / Right-click -> Open With -> Preview | Image displays in Preview |
| 2 | Access Tools | Click 'Tools' in Menu Bar | Tools dropdown appears |
| 3 | Select Resize | Select 'Adjust Size...' | Resize dialog box opens |
| 4 | Input New Size | Use controls in dialog box | Image size is changed |
By following these steps in Preview, you can effectively change the size of your picture manually to fit your specific requirements.
