What is 300 DPI and how do I change Images from my computer to the required format for emailing?

How do I tell what DPI they are?

Many Thanks in Advance!What is 300 DPI and how do I change Images from my computer to the required format for emailing?
I don't know how to tell how many DPI they are but to change format open the pic in paint and save as use the drop down menu to choose a format like jpeg.What is 300 DPI and how do I change Images from my computer to the required format for emailing?
dots per inch , send it as a jpeg, small file
DPI means dots per inch. The easiest way to send a suitable size by email is to use somthing like Picaso.



Picasso. http://www.picasa.google.com/

Find and enjoy the pictures on your computer in seconds.

A free software download from Google.



Picasa is software that helps you instantly find, edit and share all the pictures on your PC. Every time you open Picasa, it automatically locates all your pictures (even ones you forgot you had) and sorts them into visual albums organised by date with folder names you will recognize. You can drag and drop to arrange your albums and make labels to create new groups. Picasa makes sure your pictures are always organised.



Picasa also makes advanced editing simple by putting one-click fixes and powerful effects at your fingertips. And Picasa makes it a snap to share your pictures 鈥?you can email, print photos home, make gift CDs, instantly share via Hello鈩? and even post pictures on your own blog.
DPI is Dots Per Inch. U can change the resolution by using Adobe Photoshop, CorelDraw, or some other photo-editing software.