Changing a layout part
You can change an existing part’s type, break field (if it's a subsummary part), and pagination options.
To change an existing part:
In Layout mode, choose Layouts menu > Part Setup.
The break field for a subsummary part
Whether records in List View are displayed with an alternating fill, as specified by the Alternate display state
Select or deselect Use alternate row state.
Select or deselect Use active row state.
Dimmed types are not available because either:
Click OK, then click Done.
Related topics 
Adding a layout part
Deleting layout parts
Reordering layout parts
Resizing layout parts
Setting up form, list, and table views for a layout