I am a novice and i am trying my hand at photoshop. I had a question about picture resolution and i would highly appreciate some help with this.
I reduced the size of a couple of pictures in Photoshop, but the dpi also reduced based on the size. I have saved the picture with this resolution. Now the problem is that when i am trying to get this printed, the website asks that the picture be atleast 300dpi to get quality pictures. My question is - if i increase the dpi for the existing saved pictures will it help or should i go about reducing the size of the original picture and also maintain the dpi right from scratch.
Please help!

