Dynamic Data Driven Visualisation Properties

Add a button next to any visualisation property that allows you to define the property programmatically.

For example, I want to alter the height of a table based on the amount of rows in the table (and subsequently the report height and positions of other report components). I should be able to specify this dynamically e.g 10*row_height, where "row_height" is a field I provide/can calculate.

Thanks.