Atmel Studio and Build project performance

[marte001]

Hello.
I'm begginner in Atmel Studio 6.1 (I come from IAR). The project I'm working on contains dozens of source files and every time I change a source file content the build is made in all project (all files are re-compiled, not only the file changed). And it takes about 4 minutes. Is there any way to reduce the build time? (in IAR the only compiled file was the changed file).
Thanks in advance.