Hola helmer.pabuena, te adjunto una imagen donde podrás encontrar el ajuste del brillo.

Saludos,
Peter Chirinos | IT Consultant, MCP, MCSA, Microsoft Office Master, Software Developer, Microsoft Certified Professional, MAP , Microsoft Small Business Specialist, Veeam Technical Sales Professional (VMTSP), Veeam Sales Professional (VMSP), VMware Technical
Solutions Professional (VTSP) | @peter_chirinos Blog: peterchirinos.wordpress.com