Notepad is the simplest form of "word processor," designed solely for the creating and viewing of text files. It has no fancy features: You can change the font, search the file for a word or phrase, or print the file—but that's it.
Nevertheless, people use the Notepad a lot (Start→Programs→Accessories→Notepad) precisely because of its simplicity, and because text files are so common.
By default, the text in Notepad doesn't automatically wrap at the end of each line; chunks of the text may appear chopped off by the right side of the window. This "feature" evolved from Notepad's origins as a programmer's tool; when you're writing software programs, the Return key denotes the end of a command, and has nothing to do with the layout of the text. If you're not programming, you can choose Format→Word Wrap to make Notepad behave more like a "real" word processor. (Word Wrap will remain turned on until you change it.)
To print anything from Notepad that doesn't look completely goofy, you need to visit the File→Page Setup command. The document will print out according the margin settings in the Page Setup dialog box, not according to how it looks on the screen.
Notepad also has the quirk of printing the file's name at the top center of the page. To get rid of that, again choose File→Page Setup. When the Page Setup dialog box opens, you'll see some codes highlighted in the Header box. Press Delete to clear the box, and with it the automatic title printout. You can also clear the Footer ...