The prototype should convey the idea of the project, but should not contain design. But the prototype needed. As You to understand what you want from a designer to push nevpihuemoe to the page and the designer to understand what and where to insert. And preferably if you want to place text on the page to not write "some text", and not be lazy, to collect a piece of text, the average (or maximum) length. This also applies to nicknames and other similar inscriptions, and then will think what to do with the nicknames, because it does not fit wwwwww nick, and nick iiiiiiii fit into the design, though longer.