Relabel Values in Object

I have a Chart XY in Workshop that I am sorting by Value Ascending to match the process order. An example of the values from the original column in the Object are Start, Middle, and End. I created a new column to correctly order them so that when you are viewing the chart you are seeing them in the process order. The updated values are “1_start”, 2_middle", and “3_end”. This solves the issue of sorting the values but I would like to be able to relabel the values so that they look cleaner. I know that there is Conditional Formatting within objects but I think that only allows you to update the color or the alignment, not the way that the value is presented.

Any suggestions on how to relabel values?

Thanks!