This is a very basic Photoshop (Ps) tutorial,created for just beginers and photoshop enthusiasts,
This is not an advaced tutorial,Its created in such a way that even people with just know-how of computer can understand,learn and use..
ok lets start!
Start>Adobe Photoshop CS 5 is the easy and conventional method.
now you will get a new window as shown below
there you can adjust the size you needed and then click [ok]
then you will get a what i called as workspace
Adjust and do experiments, to save this as image
goto FILE>SAVE AS> IMAGE.JPG
Ok thats it! you are done!
I hope you all understand what i tried to convey.. feelfree to post ur comments [i always like to see that] and also share it with your friends who need this..