optics{ debuglevel }

• usage: \(\mathrm{\textcolor{ForestGreen}{optional}}\)

• type: integer

• values: \(z \in \{-1, 0, \dots, 4\}\)

• unit: \(\mathrm{-}\)

• default: \(z=0\)

Parameter controlling diagnostic output in the *.log file. The larger the value is, the more details are included.