Hello Brian,

Thank you for reaching out and for showing interest in our libraries.

Minor/Major grind lines are indeed not yet supported by the SpreadProcessing library, however, we already have a feature request about the implementation of this functionality logged in our Feedback Portal - SpreadProcessing: Add support for manipulating Major/Minor Gridlines in a chart.

To avoid confusion, I have changed the status of the current task to "Duplicated" and have related it to the already existing one.

If you are interested in this task,  please know that you can cast your vote for it in order to increase its priority in our backlog and to subscribe so you can track its progress and receive notifications about potential status updates in the future.

Do not hesitate to let me know if you have any additional questions or feedback.

Regards,
Yoan
Progress Telerik