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We're going to go ahead and take a look at how you can use custom preflight profiles to catch errors in our document. I'm going to open up our Preflight panel, and from the flyout menu, I'm going to check Define Profiles. I have a commercial printing profile that I created earlier and I'm going to use that one. So from the pop-up menu, I'm going to pick Commercial Printing. When I do that, this document will be checked using that profile. I'm going to go ahead and look at my document and see what errors, if any, I have. Now I notice right next to it it says I have two.
So when I look at this first one here on Page 1 and with my Info tab selected, I can see, "The page differs from the document size or orientation." Now when I look at the second error, this is the flap from our gatefold and again, that sizes is going to make different than the rest of the document as well. Now this isn't going to prevent a problem at output, but it just informs me that I have different-size pages in my document. Next, I'm going to go ahead and look at Images and Objects. I'm going to go ahead and look at Image resolution, and I notice I have two images that have potential image-resolution problems.
When I click on the first image, it's going to take me to it and it's going to tell me what the error is. Color image must be at least 200 dots per inch, based on the current profile I'm using, and it has an effective resolution of 177 dots per inch. Now I can go ahead and try to resize that image lower to increase the resolution, or I can look for another image. I'm going to go ahead and look at the next image. Now in this case, it says that the image is 129 dots per inch, but it must be at least 200 based on the profile I have selected.
Again, I can go ahead and try to resize this image. Decreasing the size will increase my resolution. Or I can locate another image. Next, I'm going to look at Color. Color space is not allowed. Again, I'm using the Commercial Printing for CMYK profile, and when I look at my colored images here, I noticed that I have RGB JPEG images. I can pick a different preflight profile that allows RGB workflow, or I can replace these images with CMYK versions.
Next, I'm going to look at my Registration color not allowed. In here, I notice I have a line that's going to show my fold marks and its colored registration. In this case, I think it's just fine, but normally you would not want registration to be used. As we can see, having a custom preflight profile will look for specific areas in your job that could cause potential output problems.
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