A professional graphic designer will create your logo in Illustrator, not photoshop. please make sure when you purchase a logo you are receiving a VECTOR format of your design, a PSD layered file is not the correct logo format.
99designs Shortcut Cheat Sheet: CorelDraw
Trying to convert those ethereal pixels into cold, hard, printable inches? Look no further. Here are the conversions we recommend for the following common photo sizes.