Sketches of dialog boxes, windows and menus are the simplest form of prototype. Pictures represent major topics of the interface, and can represent the flow through the product. All you need is a pad of paper, a pencil and rudimentary drawing skills. One benefit of this technique is that it does not require any computers or computer skills, which means it can be done by anyone and in group settings. Group prototyping is a great way to get team members and users involved and incorporate their ideas.
Computer sketches .
Using simple drawing tools gives sketches more fidelity. Relationships among controls in the interface can be seen better because it is easier to draw them to scale. Without writing any code at all, create enough paper sketches to represent the whole interface or entire segments of it. These can be tested very easily, providing good general direction. Mockups with interface builders.