JPEG (Joint Photographic Experts Group) represents a graphic file format that enables the creator of the image to balance file size with image quality. For example, users who demand better picture fidelity can reduce compression, increase quality and increase file size. Those who prefer faster-loading pics, especially for use on the Internet, can increase compression and reduce quality and file size. JPEG files that are 200-pixels square are an excellent size for casual pictures displayed on a website or in an email or forum message.
Open the Windows Paint program by clicking the "Start" button and choosing "All Programs," "Accessories" and "Paint." The Paint window appears.
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Click the "Paint" (sometimes called the "File") button in the upper left and choose "Properties" to display the Image Properties dialog box. Enter "200" in both the "Width" and "Height" text boxes. Then click the "OK" button. The document area resizes to those dimensions.
Draw an image using the built-in tools. If you prefer, you can grab an image from the Internet by right-clicking on it and choosing "Copy Image." Then return to Paint and choose "Paste" from the Clipboard group. If the image is bigger than 200 pixels square, the document area resizes to accommodate the image.
Click the "Resize" icon in the image. The Resize and Skew dialog box appears.
Make sure that "Maintain Aspect Ratio" is checked. This ensures that your image maintains its proportions. Then click "Pixels." Reduce the largest number to 200, whether it is in the Horizontal or Vertical text boxes. The other text box resizes in proportion to your choice. The dialog closes, resizing the image and document area.
Choose the "Paint" button again if you need your JPEG to be 200 pixels on all sides. Choose "Properties" to display the Image Properties dialog box. Change the smaller of the height or width to 200. The drawing area expands to that dimension, without affecting the image. Instead, a white area appears. You can fill that area with color or select the image to center it in the document area.
Choose the "Paint" button and select "Save As" and "JPEG picture" to display a standard Save As dialog box. Navigate to where you want to store the image and enter a title as needed.
Click "Save" to save the JPEG.