"Reporting extension: Bubble plot: bubble range list"

tennenrishin

Using the Report operator with

• Reportable Type: Data Table
• Reportable View: Plot View
• plotter: Bubble

the "bubble range list" presumably allows setting dimension ranges for x, y, size and color.
But what should I type into the "dimensions" sub-field in order to set (for example) the X-axis range?

Thanks
Isak