What properties are responsible for changing the right side of the columns in the pivot table

[P-a-u-l-Z]

In the pivot table, you can change the width of the columns only on the left side in the standard way.
On the right side, the column width is determined depending on the remaining space and the self-long entry in the cell.

I want to make my own extension to be able to adjust the width of the columns on the right side of the table.

Tell me which property (in HyperCube?) Is responsible for the width of the columns on the right side of the table.
Or, what properties are responsible for the maximum and minimum column widths.

Thanks.