Using property conditional expressions – PB Docs 2018

As with other DataWindow objects, you can specify property
conditional expressions to modify properties at runtime. You can use
them with either dynamic or static crosstabs. With dynamic crosstabs,
you specify an expression once for a column or value, and PowerBuilder
assigns the appropriate properties when it builds the individual
columns at runtime. With static crosstabs, you have to specify an
expression for each individual column or value, because the columns
are already specified at definition time.

Example

In the following crosstab, an expression has been specified for
Units:

The expression is for the Font.Weight property of the units
column:

The expression specifies to use bold font (weight = 700) if the
number of units is greater than 100. Otherwise, use normal font
(weight = 400).

This is the crosstab at runtime:

Values larger than 100 are shown in bold.

For more information about property conditional expressions, see
Highlighting
Information in DataWindow Objects.