Scale to PPI
With Scale to PPI you can easily resize some or all of the images in your InDesign document to match a target PPI value!
The “effective PPI” of an image is an important number in InDesign. It indicates the effective resolution of the image as it will appear in the final PDF or electronic document.
For print, the PPI (sometimes incorrectly called DPI) of all images should be 300, or at least 250. In some cases (low-resolution publications) a lower number is fine as well.
For ePubs or electronic documents, a lower effective PPI is okay since screen resolutions still are not as high as offset printing.
Whatever your target is for effective PPI, InDesign provides no way of resizing, or scaling, images, to this value. The only way is to manually resize each image, until it is more or less the required effective PPI, or do laborious calculations for each image if you need the precision.
Scale to PPI allows you to easily resize all or some of the images in your document to hit your desired effective PPI target.
How it works…
Scale to PPI does not modify the underlying graphic file at all! It does not resample the image (in Photoshop, for instance).
It simply resizes the image directly in the InDesign layout.
By reducing the size of the image, the effective PPI goes up. For example, halving the image doubles the effective PPI.
Conversely, enlarging the image reduces the effective PPI. For example, doubling the image size halves the effective PPI.
So if the effective PPI is more important to you than the actual size of the image on the page, Scale to PPI will make it easy to modify all images in the document to achieve this target.
- Enlarge or reduce all images in the document, or just the selected images, to achieve your desired effective PPI.
- For very high-resolution images, optionally set a maximum image size.
- Choose in which direction images should be scaled by pinning the appropriate point in InDesign’s Control Panel 9-point proxy before running the script:
Click here to view the Help page for Scale to PPI.
Scale to PPI works with InDesign InDesign 2021 down to InDesign CS5, on Mac and Windows computers.
To purchase the full version of Scale to PPI for only $49, click the “Buy Now” button. Your product and serial numbers will be available for instant download when you complete the purchase.
If you are not satisfied with Scale to PPI for any reason, simply let us know within 30 days of purchase for a full refund.