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- set the RTickLabel property. Make sure you have a label for each tick. Note that the label text is indepedent of the tick location value. You can set tick locations with the RTick property.
- Set the ThetaTickLabel property (one for each tick). Note that the label text is independent of the tick location value. You can set tick locations with the ThetaTick property.
- Set the GridColor property. Because the line is so thin, making it black doesn't make it much darker. I do not see a property for grid line width.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/278617/image.png)