If the photos taken by the digital photo studio seem to be this size, I sent them before, and I copied them directly from the photo studio.
If the estimate of the photo needs to be scanned, if the electronic version of the photo is photoshop- Edit-Image Size, and then fill in the number you want, it is estimated that most photo editing software has this function.
Use photoshop
If you just change the size, adjust the brightness, add borders, watermarks, signatures and other simple effects, you don't need to download huge software at all. Small and practical picture processing software-light and shadow magician. Below is the download address of the green installation-free version.
The easiest way is to use the drawing software that comes with windows. You open the drawing software-edit-paste the source code, open the photo to be modified, click on the lower right corner and drag it yourself until the size you want is released, and click on Save File as ... OK.
ACDSee 9.0 Simplified Chinese Hardcover Edition
There is special software. Go to Jilin English Topic Network. When I signed up in it, I remember that there was a special software to change photos when I signed up.
Compress with ACDSEE software. Save.
Your respect/sincerity