Many different types of industries use Photoshop for different purposes. You have people who use Photoshop for film work; you have Photoshop users who create textures for three D models and games. You also have users who are specifically creating things for magazines and other print media and then you have your website designers and your game designers who are working on things that are going to be seen on TV and on the web. So when it comes to image size and resolution I just want to clear up a few things that will make things a little easier to understand as far as what you're doing in Photoshop for certain tasks. Let's first of all talk about the web designer. Up here in the image size dialog box, by the way if you didn't see where I got that from, I went to image, image size. This is the area that web designers should keep their eyes on right here and the resolution down here. Now what this means as far as pixel width and height is the realm of the person working on something that is going to be seen on a monitor of some type. When you're working on a screen, whether its computer screen or television screen, you are not going to be working in inches as you see down here you're not gonna be working in percent, you're gonna be working in pixels. Pixels are what make up these monitors. They're made up of millions and millions of these little dots called pixels and each one can have one of a billion colors for example. Now that's going a little too far but as you can see you understand my point. So this image as you see here is 1491 pixels wide by 1044 high, now most web pages are nowhere near these dimensions, most people design websites for a width of about 600 pixels or 800 pixels and a height of about 600 to 800 pixels, of course these vary. But as you can see if this was going to be on a web page the page would be larger then most monitors, unless you have a very big monitor. Also the pixel dimensions give us a size of 4.45 megabytes which in and of itself is unacceptable for web purposes. So what would you do? You would knock this down to something more reasonable for the web, for example, 600 pixels by 420 if this is gonna be your splash page or something even smaller. Now I do cover in another lesson how to use another feature as you see here called file, save for web and devices which will give you a much, much better compression scheme when it comes to knocking down an image size for use on the web. But I'm gonna go back to image size here and just remind you that you're gonna be working in pixels. Another way you can deal with your resolution is you wanna work for web at 72 DPI no higher because your monitor can only display 72 pixels per inch. Think of it this way for every inch on your monitor there are 72 dots going this way and that way, 72 pixels per inch, no more no less so even if you bump this up to four billion it won't make your pictures look any better so that's something very important. You don't want to go too low though so keep that about 72. I'm gonna put that back at 300 now and I'm gonna come on down to the second size and this is where people who are doing things for print media, magazines, newspapers, postcards that kind of thing. You live here, this is document size and you're dealing with inches, you're not gonna do anything else, you're gonna be dealing with inches unless you're working for a magazine or a newspaper who works in centimeters, millimeters, points, picas, and columns. So of course these are all print related. So what does this mean? This means that when we print this to an actual printer and you hold a paper in your hand this image is only gonna be 4.97 inches wide by 3.48 inches high and the resolution at 300 pixels per inch is gonna give us a nice quality printout. Now if we were to lower this to 72 pixels per inch the image quality would suffer, it would degrade because we're telling the printer to use less pixels per inch so of course we're gonna have a grainier image. Now in some of the places that I worked I've printed things out at 600 pixels per inch. Now of course you also have to scan in your images at a nice quality so don't think that by bumping the resolution up just from this dialog box you're going to increase the quality of the image. A lot of people think that you know because the, they're printing from the web the image on the web is 72 pixels per inch they think that if they bump this up to 300 or 600 the image will get better because Photoshop will fill in those blanks, not the case. It's not going to help very much so don't even think that. If you want a nice high quality printout you have to put in at high quality by scanning it in. So once again I hope this image size and uh resolution whole thing is covered up and cleared up a little bit more clearly for people who want to know the difference between working on the monitor with the pixels dimensions and working with print output from the document size.
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