it don't work DPI that is

[hosehead48]

can someone help me figure out what is wrong.
I go into my computer go to diplay and go to settings.
Then there is a 2 color graph and a 16 color graph. I turn
it to the 16 color graph and then go over to the DPI slider
button and click on it to move that higher in DPI and it don't
work it just stays at it lowest point.
To run my photo shop software I need a 250 Dpi. Thats
what it tells me when I try to call it up.
I'm new to this stuff so be gental.
Thanks
Hosehead48

[kb244]

um, DPI = Dots Per Inch, this is in regards to printing resolution. For example If you have a two megapixels camera, and you want to print onto a 4x6 peice of paper the best you can do is 4x6 @ 250DPI or so. When you go larger such as 8x10 it starts getting down to 200 DPI, then higher the DPI keep getting lower, because you only have so many pixels to fill an area of paper. On the computer messing with the DPI does nothing because, if you have an image 1600x1200 , its exactly 1600 pixels across and 1200 pixels down. Just because you save a 1600x1200 image, at a higher DPI Does not mean you'll get higher quality on a printout does not work that way. Professional level of acceptance tends to be arround 300DPI, I can print upto 10x6 @ 300 DPI with my 6 Megapixel camera, but most consumers are impressed with 150 DPI quality or higher.

EDIT :

Then again.... maybe I'm not understanding what you are even talking bout, Are you trying to say that you are running your computer in 16-COLOR mode, and that photoshop needs least 256 Colors to run? If thats the case buy a new video card man, or get the right video card drivers, I wouldnt be messing with photoshop unless you were working 16 MILLION colors, which is 32bit.

-Make sure you got a good computer
-Make sure you are not in safe mode
-Make sure you got the drivers loaded for your video card
-Etc.