Hi Lynda,
 
in photo editing software you can look at the image properties and make changes...Once you change the DPI to 300 you also have to change the image size...I think in most applications this is in inches....
 
Let me know if it works out!
 
Don't give up!!!
 
Cheers,
Diana

What I like to do is this:
If you have a program like Photoshop or Paintshop pro, you first open up the pic then cut it out. Second, change the size of the now blank area to 300 dpi and then paste the original image back. Then you just crop down to the original pic.
 
But that's just my method.
It's a few steps but for me it's easy...
 
~L~

Hey Lynda....
There's a SUPER EASY program to change resolution size...
it's called PAINT.NET  (download this program FOR totally FREE).
I use SEVERAL different Graphics Programs, but this is the only one I use to re-size pictures to fit the correct Resolutions for GCU.
 
Download PAINT.NET, and when you have your pic in there you want to re-size...
just go to....IMAGE, then RESIZE...and it states the resolution right there...it starts with 96, and just change it to 300 (or whatever) save the pic as a JPEG...and  
well-A!!
 
SUPER EASY
 
Hope that helped!
 
EL
http://www.greetingcarduniverse.com/monkeyartz

Go to the top of Paint shop Pro where the grey bar is and click on Image and then go down the list and click on resize then a window pops open on the top right side. Go click on the bottom inside bar and click backspace button and click in 300 for your dpi. Then go the Print size clear the space and click in 7 for Width and 5 for Height or the other way around pending which way your card is  and under Pixel Dimensions of Width and Height put in 100 that is the percent. Go back to the left side of the screen and click on the dotted rectangluar thingy and click the top one that looks like it and then hold the mouse down and drag the dotted lined box over your picture or drawing and let it go to 1500 x 2100 at the bottm right of your screen that you'll see it. When you have 1500 x 2100 then go back to the left top corner and click file and under it go to Save As and click on it. Don't forget to name the card to where ever you file to and make sure it's in JEPG or any jeg you have to set it up in. That should do it . That's how I do mine as I have Paint Shop Pro 9 . I know it's a tad long winded, but that's how I know to do it . It works for me .http://www.greetingcarduniverse.com/firebirdscardstore

Sorry my method didn't work for you.
I like to do it that way as I mentioned because if you open up the pic and just change it to 300 dpi right off the dot, it makes the image blurry and pixelated. If you set up the size then paste in the pic sometimes that makes all the difference.
 
Then you just crop and resize as necessary.
Depending on the project I will save an image from 800 x 600 pixels to as large as 2500 x 1140 pixels. Depends on what the project calls for.
 
You aren't working with Win98 still are you?
Some of the older computers don't like large files.
 
Hope you find a solution.
 
~L~

I get around all of this by scanning the art in at 300 dpi. Once in Photoshop I can change the dpi, the actual size of the image, save it as anything I want. This gives me a great deal of flexability with how I want to use my files.  
 
BTW, I print giclee prints professionally and would never print one from a file that is only 72 dpi, but then I can print an image up to 44 inches wide when scanned at 300 dpi.