The lines should be long, not short, as the software may mistake short lines for letters. Put your name at the top of the resume, but the address and contact information can be bottom or the next line after your name. You may use bullets, but they should be solid and round. Spell out the words. Don't use newspaper-like columns.
Electronic resumes can be as many pages as is appropriate.
Submit original laser or good quality ink jet originals, not copies or faxed sheets, as they will have lost sharpness. Don't fold resumes. The creases can distort letters or even be read by the scanner as lines of text No staples. The scanner may read the holes as letters. Use standard size paper, white or cream color.