Graphic designers: How do you raise the resolution of an image in Photoshop without...

...making it bigger? I'm working on a graphic from scratch in Photoshop (I know I should ideally be using Illustrator, but I don't have it) I want the resolution to be 300 dpi, but every time I raise it, the size of the image goes up. By that, I mean the actual image size goes from 1 inch to 10 inches; I'm not referring to the file size per se. I fully expect the file size to go up, but how do I keep the image small while raising the resolution?
 
1) go to Image>>Image Size
2) In the Image Size window, Document size part, type the resolution you need and make sure "Resample Image" is checked.

The width and height of your document should stay the same, even though the pixel dimensions will increase (because you will have more pixels per inch).

Hope this helps.
 
You just "zoom out." It doesn't matter what size it appears on the monitor. It is what size it prints out that does, and, no matter what it says in the Photoshop "Image size" dialogue box, you can still scale the printing to any size you want.

For example, Photoshop may tell you that your image is 300 dpi, at eighteen by twenty-four inches, but you can still print it to an 8.5 by 11 inch paper.
 
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