72 is the is required if you have clients that like to be exact for font size, for example.
If my resolution is 100 than my 72 px text will change to 100 px text.
Hope this helped
For high-quality photo printing, it is recommended to use a resolution of 300 dots per inch (dpi) or higher. This will ensure sharp and detailed prints.
To convert an image to PNG format for printing, you can use image editing software like Adobe Photoshop or online tools like Convertio. Simply open the image in the software or tool, choose PNG as the output format, and save the file. Make sure to adjust the resolution and dimensions for optimal printing quality.
Its the amount of pixels per inch
To blow up your picture to a larger size for printing, you can use photo editing software like Adobe Photoshop or online tools like Canva. Simply open the image in the software, select the option to resize or scale the image, and enter the desired dimensions for printing. Be sure to maintain the image quality by using high resolution settings to avoid pixelation or blurriness.
Any time you want to reproduce (print) an image it would be a good idea to use a high resolution file. Have you ever tried to print out an image that is off the internet? Most of those images are only 72dpi. They look fine on your monitor where your eye fills in the bumpy parts, but just try printing them out at least 6 inches wide and... yuck!
When printing photos, it is recommended to use a resolution of 300 dots per inch (dpi) for high-quality prints. This resolution ensures that the printed photos will have sharp details and vibrant colors.
PSD is native Photoshop format and supports most of Photoshop editing capabilities. You can send to some (not to all) printing companies PSD files. Otherwise save file for printing purpose as PDF or TIFF.
The optimal resolution for printing high-quality photographs at 16x20 size is 4800x6000 pixels.
Adobe Photoshop is the best tool to use in case of digital image correction and editing. For use of images in digital offset printing be sure that your image is in print mode (CMYK) so that the colors will separate properly as in the case of offset printing. Helpful hint: only convert the image to CMYK when you are nearly finished editing the image for print- that way you have more access to the tools in your image editing software such as Photoshop.
Image > Image Size
The recommended 300dpi resolution for high-quality printing of images is 300 dots per inch.
Use the crop tool. After selecting the Crop Tool, set your desired dimensions in the Width and Height boxes at the top of the screen. (Enter 25 px in each box). The Resolution also needs to be set dependent on what you intend to use the photo for after cropping. Printing or email/website usage. Printing requires a higher resolution (300dpi) while email/websites don't (72dpi).