Photography halftones and setting it up in Photoshop.

I work on the newspaper at my school and I am one of the photographers. Well after the last issue with our digital photography we got a guide how to set up a digital picture in Photoshop so it looks good printed. I am unsure how to do somethings in the instructions. These are the instructions.

Digital files: 300 dpi
Shadow Dot: 87
Highlight Dot: 9
85 Line Screen
Round Dot
Save picture as RGB file, adjust excess colors before convert to Grayscale.

Ok, I Know how to make round dots, and I kind of know how to adjust color, I also know how to convert to Grayscale. But everything else confuses me.

How do I set the Shadow dot and Highlight dot?
And where can I change the dpi?
And how do I set the Line Screen?

I can't seem to find those options or figure out how to change them. I looked all yesterday though the Photoshop help. But I still could not find it. Help would be greatly appreciated.

dpi can be changed by going to image > image size then resolution. you'll have the option of using the default 72 dpi resolution. Change it to 300 dpi. You'll notice a marked improvment in detail and growth in size...both W&H and file size.

As for shadow and highlight, I assume what is meant is going into image > adjustments > color balance. You'll see shadow and highlight among the options.
But they could also mean contrast, brightness, or levels... ? hmm.. I don't know.

thanks alot, but what about line screen? Is it auto set? I have explored around the options in photoshop and have never even SEEN the line screen option. Also, for the round dot option, it is in the Bitmap selection, I got to image > mode > bitmap, then I use halftone screen and that is where I adjust to round dot.

As I have no clue to what we are talking about..
I have a suggestion. Open up the PS help file, do a search for: line screen
You'll find-
Selecting halftone screen attributes
Specifying halftone screens for Bitmap-mode images

I read something about using print preivew to adjust screen attributes, And somewhere in there you can adjust the line fequency..

But I hope the search you do pulls up the right information for you.

alright, I finally understand what's happening.
It turns out you should look up those help files I pointed you to and also read the primer on this website:
http://www.adobe.com/support/techdocs/7066.htm

Reading it will help you in understanding how you can use photoshop to make your images blend well.
To quote what is meant by "line screen":