## CodeRunner Documentation (V3.1.0)

### 10.1 Column specifiers

Each column specifier is itself a list, typically with just two or three elements. The first element is the column header, the second element is usually the field from the TestResult object being displayed in the column (one of those values listed above) and the optional third element is an sprintf format string used to display the field. Per-test template graders can add their own fields, which can also be selected for display. It is also possible to combine multiple fields into a column by adding extra fields to the specifier: these must precede the sprintf format specifier, which then becomes mandatory. For example, to display a Mark Fraction column in the form 0.74 out of 1.00, a column format specifier of ["Mark Fraction", "awarded", "mark", "%.2f out of %.2f"] could be used.