Configure variables

The Variables panel allows the customization of each of the available variable. It is possible to define how
numerical variables should be formatted. Common formatting patterns include "0%" to display percentages,
"$ ,###" to display currency amount and "0.00 hours" for timing information. It is also possible to define
the type of aggregation function that should be used to summarize the hierarchy when the Group by
function is used. Finally, one has the possibility of adding derived variables. To do so, click on "Add..."
at the bottom of the panel, give a name to the variable to be created, and enter an expression to define
how it should be computed. Use for example "[Budget] / [Current]" to compute the ratio between the Budget
variable and the Current variable.