How do you Change the Resolution to 300dpi in Photoshop CC
Hi there. It's a real me back again for a little bit. This particular video is about resolution in Photoshop. And what I'm gonna do is I'm going to jump between this live headshot stuff and the screen there because it's a little easier to explain when I wave my hands around. So um yeah let's get started. We'll get started with the screen stuff and then we'll come back. Let's go to that. Alright so let's open up to files. Let's go to file. Let's go to open and in your exercise files there's one called color modes and resolution. And I want you to open up these two resolution and 02 by Hunter johnson click open. So one is a teeny tiny version and one is a nice big version. So resolution is just another word for quality. Okay good quality, bad quality, high resolution low resolution. And another word for resolution is pixels per inch or dots per inch. D. P. I. P. P. I I'm blowing your mind with different words. Let's stick to resolution. High and low quality. So this one here I'm looking...
at 02 is low quality. It's because when I zoom in. Okay this actually you'll actually start to see look it's actually made up of little squares. So an image is just a collection of coloured dots but from a distance if I zoom out far enough it looks like a proper legit image and that's true of both. Good and bad quality. Okay so I can I can see the dots quite easily in this low resolution low quality version but no one it looks like a proper legit real life in front of the image but that's because my brain can't see when I zoom in. Okay. If I zoom in far enough can you see it's actually this one here is just made up of more dots and my little brain can't tell the difference between real life and like lots of little cubes joined together at a certain resolution. So let's jump out to live head dan now and let's talk about two kind of example projects. All right. So what we'll do is we'll talk about to kind of like common projects or uses for resolution and photoshopped. We'll do a kind of a web job and a print job. We'll start with the web one because it's probably what you're gonna do most often I'm guessing. Um So let's say that we've been given a specific size we need for a website let's say it's to our Wordpress blog. Okay. And it has to have a maximum size of 1200 pixels wide. Okay. Or it's some sort of social media. So um instagram has a maximum image size of 1600 pixels wide. Or your twitter bio needs to be you can see those requirements that says can cannot be larger than X. Y. Z. Okay 2000 pixels. So we're gonna go and do that now and look at how to yeah force our image to be a specific size for a web project. So I want to go to image and adjust my image sites now. They may have may not ask for it but the resolution needs to be at 72 and this little chick re sample image needs to be turned on And over here, depending on that. They might have asked for cm. You can adjust it just as easily in here. I'm using pixels because that's what my Twitter bio asked for. Let's say it's 1600 across so it's 1600 was the largest size is adjusted the height for me, proportionately awesome. It's 72 dots per inch and clicking. OK. It's a lot smaller. Do a file save as Jpeg and upload that to Twitter or Instagram or reddit or whatever the site is that needs a specific size. So 72 is a really common resolution. Let's talk about the slightly more complicated print version. Let's jump back out to real Dan. Alright. It's time for a print job. So we've been asked to stay with the photographer and we're working on getting our image right? But then somebody asked us for our version of our image for a print job. Okay. And they've asked for a couple of things that you might be given a spec sheet or they might have emailed it to you and they said okay we need your image to be in C. M. Y. K. Which we looked in the last video and we need it to be let's say 300 D. P. I. Okay. Or they might say P. P. I. D. P. I. And P P. I are interchangeable terms. Remember okay dots per inch pixels per inch. Old school, new school, 300 D. P. I. Are the same. Okay. I say D. P. I. Because that's why I learned but because of P. P. I. You'll find a bit of both around. So it's 300 D. P. I. And they haven't asked for, they just asked for it as big as it can be at 300 DPI I let's say that's one kind of project. The next project is C. N. Y. K. But we need it at a specific size so it needs to be 18 inches across at 300 D. P. I. So it's really specific. So let's look at both of those scenarios now in the screen cast. Alright, so we're back in here. I'm going to go undo. Okay to go back to my original image. So I've worked on this image, I've photographed it. It's great. I need to get it to seem like a which we know how to do in the last video. Great. Seemed like a perfect and now I need it to be 300 D. P. I. Or P. P. I. Good image. Let's go to image size and what we want to do in this case is we want to turn re sample off Because what ends up happening is watch this if I change the 72. So let's say working inches sort of 68 inches. So what I need to do is I need to change this from 72 which is the really common websites to the really common print size, which is 300. Watch what happens to the width and height, 300. You got a whole lot smaller. It went from 68 down to 16. Oh no, let's jump to real dan to explain. All right, so now it's time I get to wave my arms and I find this is the best way to explain that kind of weird re sizing going on. So for screen or for a website, they want 72 dots per inch. Okay, And We look at it on a screen and it looks great. That's that's all you need 72 dots and an inch. So let's say I've got an inch here it is here, there's 72 little cubes in there. Okay, all colored dots and that is my my little human brain goes, that looks perfect. Okay, but when it gets to print, they need a lot more dots for a realistic print. If you print stuff at 72, you start to see the dots, just the techniques that you used to go through printing there, it just looks bad. So to get past that to get to that, like really good quality that you pick it up and go, that's a photograph. Okay, you need 300 little dots in that same inch. Okay, so 72 dots per inch. Okay means I've got an inch. They're sending two little dots if I want 300 in there. What we have to do is the same inch. Right? But we have to say well I want some more pixels to fit in there. Where do we get them from? So we go, well there's all these other pixels around. So let's let's start dragging them, pull you come in here, you come in here, you can you keep jamming them in there. There's 100 in there now. Okay now there's 200 and keep pulling them jacking them in and then eventually you cram 300 into that same image. The trouble is you have to pull all those pixels out from the rest of the image. The whole image has to resize to come down. So basically you're grabbing all those cubes just crushing them. So they're more dense. Does that how that's the best way I can explain it. Okay, so That's the tradeoff right, is that 72? Great for screen print? It needs to be about the third of the original size. It's not perfect but it's about the right kind of ratio. So that's why the physical size gets smaller so full. Stop, that's that done. Let's say you remember our second step where we said. So the first step was put it 300 and just give it to us at the whatever size that ends up being okay. But let's say that we want it to be an exact size. So we want to be 300 dots per inch but we need it to be 20 inches across. And we saw before right that it can't be 20 it's 16, 18. But you know it's it's not that big. So let's go and work out how to force Photoshop to to kind of make it the size we need and the kind of trade offs for that. So back to screen. Alright, so before remember what, 72? Really big? We changed it to 300 you're like oh no it's heaps smaller and that's just the size it is. That's the best quality. It can be 300 e p I it's only going to be 16 inches across. Let's say I'm just going to turn this on. We did this before. So it's 300 it's a 68 K. What's going to end up happening. Can you see over here? It gives you a preview of this group that appears Photoshop says well I'm just going to generate all these extra pixels and it tries its best but there's just too much to do and you end up with this kind of goofiness. Have you? You've probably seen it in images before. Okay it's Photoshop. It does it's the best thing to try and do it but the images are not there. So it starts starts duplicating pixels willy nilly and You end up with this kind of interpolation stuff so huge jumps like that. Just don't work. What you can do though is let's turn that off. So remember it's 16 is the largest it can be but let's say we just needed to be 18 or say let's say 17 we just need to be a little bit bigger. Nobody's going to notice turn re sample on changes to 17 You see here it's no better. No worse than it was before in my opinion. Can I go up to C18? Yeah probably I'd still do it. Put an update that they say it needs to be 18 and 300. I'll probably do it because it was close enough to it. So when you start getting over this like when you get past the 10-15% increase you start to see pixels and it starts to look a little bit bad. The further you get over that the worse it gets like we saw before. So this little re sample image here. Okay with it off it will be exactly 72. It's gonna expand out to the nice big size because that's all the internet needs but when I get to shrinks down. I can turn this on to force it to be a physical size making it smaller it's perfect. Say there needed to be 10 inches, that's great. There's plenty of pixels to go for smaller but to get bigger you can go a little bit bigger but not too much. All right back to other than Alright, I hope that was helpful if you are like man that was really hard. It is really hard and it's a resolution can be tough. The takeaways, I hope our web stuff is at 72 dots print. You can have it larger. Okay. Anything that goes to print is going to be about a third of the size and you just go to image image size, make sure re sample is off. Okay. Type in 300 pixels per inch and that will give you it's it's the print size at its very best quality. Okay. If you need to force it to be a size doesn't really matter if it's weird web or print, just turn the re sample on. Okay. And that with that on it will force it to be whatever you tell it to be and if you're going smaller, perfect. If you're going bigger, it's gonna start inventing pixels and start you know, you can go a little bit but if you go too far you start seeing all that yucky goopy picks elation stuff. Um Yeah, that's enough for resolution. Let's get into some super exciting stuff again. Right