iPro Slides - Artwork Size and Image Area

Back to Preparing Your Artwork - The Details...


  1. Preparing your artwork
  2. Image Area and Sizing considerations
  3. Artwork Layout and Orientation
  4. Saving the File Type and Submitting the file


The finished size of your iPro Slide artwork will be 642 pixels x 642 pixels. The usable Image Area is 592 pixels in diameter.
Remember that your light fixture projects a circle of light. So even though the iPro Slide artwork is a rectangle, only the center circle will project. This circle is called the IMAGE AREA. And in the case of most typical light fixtures, the size of that Image Area is 592 pixels. Some light fixtures will claim a larger area, but we have found that to retain a sharp focus, you should stay within this 592 pixel circle.


These three numbers are not the same, though they are related. IMAGE SIZE refers to the size of the picture when printed. DPI is a measurement of resolution, or how closely the pixels are packed together. PIXEL COUNT represents the actual number of pixels making up the image in width and height. (Many digital cameras advertise their resolution in MegaPixels. This is simply the maximum pixel count the camera can resolve, width X height. So a camera with a max resolution of 1280 x 960 pixels will create a picture that contains 1,228,800 pixels or 1.2 MegaPixels.)

PIXEL COUNT is independant of resolution and represents the actual number of dots used to make up an image. Resolution (DPI) simply describes how closely the computer packs those dots together. The more closely packed together the dots are, the cleaner and crisper the image will render, up to the maximum resolution of your printer. It is this packing of the pixels that determines the printed size of the image, IMAGE SIZE.

It is very simple math to determine how big the printed image will be. Take the actual pixel count, and divide it by the resolution. The result is the size of the printed image, in inches. For example, a 699 x 699 pixel file, at 233 dpi will be 3" x 3" printed( 699 ÷ 233 = 3). The same 699 pixel file at 133dpi will print at 5.25" (699÷133 = 5.25) You can also work that this in the other direction. If you have a file that is 3"x 3" and you set the resolution to 150dpi, you know that the final pixel count will be 450 pixels x 450 pixels.

One aspect that is often confusing is that images appear much larger on your screen than you think they should. The print at the proper size but are often 4 and 5 times too large on the screen. The reason for this is that the computer monitor always shows images as if their resolution is 72dpi. So your 699 pixel image will appear to be 9.7" on your monitor (699 ÷ 72 = 9.7). To make it appear at a more manageable size, use the magnifying glass tool to zoom out and make it appear smaller on screen (hold down the option key to zoom out). This technique does not affect the PIXEL COUNT or the RESOLUTION of the file, just changes how it appears on screen.

In Photoshop and other graphics programs you often have an option to view your artwork at the size it will print. When View as Print Size is selected, the computer automatically reduces the magnification to show you the image at its printed size, which is as you now know, determined by the pixel count ÷ dpi.

One other caution — any graphic that you might take from a web site is 72 dpi. These gif and jpg images will appear quite smooth and even on screen, but when you attempt to make them into an iPro Slide, they will be coarse and grainy. Do not be convinced by your client to "grab" their corporate logo from their website as artwork. You, and they, will be disappointed with the results.

Next — Layout and Orientation ...