If you select this option, RealView Debugger generates an auto-range from an expression that you enter. It can be one of the following:

Function name                       Address range is from the start to the end of the function

Structure                                 Address range is from the start to the end of the structure

Array symbol                          Address range is from the start of the variable to the end, where the end is the start+sizeof(var)

RealView Debugger filters the information down to only rows represented by the generated auto-range.