How do I set my Nikon 5100 to shoot pictures that come out under 500 pixels? I want to upload pictures to my website.
You don't. The camera can save files in three resolutions:
- 4,928 x 3,264 [L]
- 3,696 x 2,448 [M]
- 2,464 x 1,632 [S]
After taking a photo, you can use the "Retouch" menu's options to help you, though. The "Resize" option will let you resize an image down to 320 x 216. (Consult page 184 of the manual for specific steps.) To be honest, I would not use this feature and would prefer to resize an image after I've got it on my computer and can better work with it.
There are a number of applications that can resize your image. In most of those you can set the size of the longest direction (vertical or horizontal) to 500 and have the program calculate the size of the other direction. One free such program is paint.net (Windows only).