Do you want to change the default setting to change the number or inline (nested) row shown as child?
Or just want to change the number of rows shown as child in detail view?
If latter case, then you got to the details view and change the setting for max nested rows.
Please provide a screenshot of the improper display within the app emulator of the app editor. Please include in the screenshot the very bottom line under the app emulator that identifies the view and table.
Please also provide a screenshot of the view configuration of the view identified in the first screenshot.