Rotate labels in a scatter plot

[#1]

Hello everyone.

I've searched through many posts but still haven't found a solution. I hope someone can help with it... Use the Big Class sample dataset as an example. I set the weight as Y, the name as X, and the label by the value.

I want to write a JSL to rotate the labels in the plot by 90 degrees as shown in the figure below. I find an option to set the label format in graph builder, but still can't rotate it. 

Thanks!

[#2]

I don't think you can rotate the labels easily. You can use graphic script to add them or possibly use marker draw expression (both can get slightly complicated).