When the user is done editing code, it is time to build. On the build menu, there are several possible build options available. Atmel Studio can hold several projects active at the same time, within what is called a “solution.” This can be useful in several ways. The user may open an example project to see how to use a particular function or library, and keep this project open while copying code into a project. Or they may develop code for more than one microcontroller at the same time, sharing libraries between the two projects as communication are brought up between them. Designers can build entire solutions, or build projects separately. The simple example shown here contains only one project in the solution, so it really does not matter. To build the project, just press F7.