I'm wondering is there a way to bind a text box to a char to add the units to the y axis?
Yes, You can add a text in a chart. Go to Properties of chart--> Presentation--> Text in Chart.
This will do the job.
Yes you are able to add the Text on the chart any where you want it just go to Properties -> Presentation -> Text in Chart. And if you want to change its position just press Ctrl+Shift then when red line marks comes adjust yours text on chart.
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