Power BI visual selecting which underlying data to output excel

[Anonymous]

Hi all, 

I have a large data set with multiple columns, from these columns I created a graph to show the trend. Can someone help me how I can select the columns which users can export to excel?

It looks like Power Bi now randomly selected a few columns which are exported. 

[v-chuncz-msft]

@Anonymous ,

You may take a good look at Export the data used to create the visualization.

[Anonymous]

@v-chuncz-msft , Thanks for the link however I can't find an explecit answer to my question. How can I select the columns which can be exported to excel in the data set or the visual? 

Or is this not possible?