Github user soralee commented on the issue:
https://github.com/apache/zeppelin/pull/2133
I think the following JIRA issues are similar with this PR
* [ZEPPELIN-1892; Display label vertically or horizontally
smartly](https://issues.apache.org/jira/browse/ZEPPELIN/ZEPPELIN-1892)
* [ZEPPELIN-1370; Label overlaps - in default visualization example
barchart](https://issues.apache.org/jira/browse/ZEPPELIN-1370)
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