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Resize images before uploading to dotCMS Excluding background/banner photos, it’s best to resize photos to smaller than 800 pixels (width) by 800 pixels (height) before uploading. If your page has photos that have been uploaded to dotCMS at a large pixel size (e.g., 2000px by 3000px), your webpage will load slowly because of the photo size; even though you may have set the photo to display at a smaller size, the page will still load the original file size.
On a Mac
Open the image in "Preview"
Click the "Tools" Menu and then click "Adjust Size..."
In the "Image dimensions" dialog box that appears, type in the desired width in pixels, or percentage, which will then adjust the height to scale proportionately. Make sure that "Scale proportionally" is checked
Click OK and save your image
On a PC
Open the photo in "Paint"
Click the "Resize" button in the "Home" tab
In the "Resize and Skew" dialog box that appears, adjust the size in percentages or pixels. Make sure "Maintain aspect ratio" is checked