The checkbox “Show Only New/Changes lines” in the Purchase order change order LU show/hide the lines only when certain fields gets change and it does not consider any changes made in any Custom Field.

I have a custom field CF$_X1 on the Part Order Lines,

I want the Show Only New/Changed Lines function to recognize any changes made on CF$_X1 as Change.

What is the best approach  to achieve this?

TIA