Go to "Image", then from the drop-down menu, choose "Image Size". In the new box that opens, you can change the width and height of the image, by pixels, or by a percentage, as long as you have "Resample Image" checked at the bottom of the box.
If you want the image to maintain it's correct proportions when you scale it, then check the "Constrain Proportions" box. This will ensure that you don't change the size of the width, more than the height, or vice versa, which can lead to an image which appears stretched or deformed.
Under the "Resample Image" box, is a drop-down menu, in which you can select different algorithms for increasing or decreasing the image resolution. Different algorithms are more suited for different tasks, with hints provided in parenthesis as to what each algorithm is more suited for.
Example: "Bicubic Smoother ( best for enlargement )"
Note that increasing the resolution of an image will not increase the detail, so making a very small image larger will make the image appear stretched, blotchy, or pixelated.
Image > Image Size
Open image in Photoshop then go to Image > Image Size.
Once in Adobe Photoshop, select image at the top of the page and then select image size. Now you can select the pixel dimensions. There will be a few windows/boxes that pop up. These will allow you to change the image resolution to 300 DPI.
When you change physical size of image in Width and Height fields its not necessary to change resolution. If you publish image to web you are inerested in Width and Height of image not in resolution, if you gonna print image then you must look in Resolution, most printers need 300 pixels per inch to print. Changing Resolution field will automaticaly change Width and Height of image in Photoshop (turn on Resample Image) and you will get best possible result with pixels you have.
The best way to decrease the resolution of digital artwork is to open it with Adobe Photoshop. Then go to the top of the screen and click Image > Image Size > and change the number in the box labeled "resolution." Be sure that "Resample Image" is checked so that it will discard the extra resolution, rather than reallocating it. Then Save As, and you're done.
In Photoshop, navigate to the Image menu, then click Image Size... You can change the amount of pixels in the Pixel Dimensions section.If you don't have Photoshop you can download the XnView image viewer for free and use that to resize it. Open the image in XnView, click on Image then Resize. You can change the resolution in the Screen Size section. After you change the size you will need to save the image from the file menu to save the changes when you close XnView.
The best way to decrease the resolution of digital artwork is to open it with Adobe Photoshop. Then go to the top of the screen and click Image > Image Size > and change the number in the box labeled "resolution." Be sure that "Resample Image" is checked so that it will discard the extra resolution, rather than reallocating it. Then Save As, and you're done.
Photoshop is an image editing program. Resolution is the term used for how dense an image is pertaining pixels. Photoshop can handle any range of resolution as long as the computer has enough speed and enough RAM (Random Access Memory) to handle large resolution images. Within Photoshop, resolution refers to pixels per a measure of length. In the US, it is usually measure as pixels/inch. In Europe, pixels/centimeter. A pixel is the smallest "part" of an image, so higher the pixel/inch gives the image more detail and "crispness."
After opening the image you want to check the resolution of by going to "File", then "Open", click "Image", and then from the dropdown box, select "Image Size". In the new box that opens up, the width, and height boxes will tell you what resolution the image is.
First check resolution from Image - Image Size, then convert to CMYK colors from Image - Mode - CMYK
The factors that determine the sizes of Photoshop files include the resolution of the image, the number of layers, the complexity of the design, and the file format used for saving the image.
In Photoshop go to Image > Image Size.