How to make vertical annotation when using DataTable roles?

[Anuroop]

Hi,

I am using the DataTable Roles feature to annotate LineChart as mentioned in the below link:-

https://developers.google.com/chart/interactive/docs/roles

But the annotations are coming Horizontal and not vertical. For example "Started Using Spreadsheets" annotation below is vertical which is what I want but for me its not coming vertical.

I am using the below code to add annotated column:-

addColumn({type:'string', role:'annotation'});

Please help.

Regards,

-Anuroop.

[asgallant]

I don't believe this is supported in the API.