Github user Leemoonsoo commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/419#issuecomment-155629746
Create output larger than paragraph width, eg
```
println("""%html <div style="width:2000px;border:1px solid
gray">output</div>""")
```
and create other paragraphs a head of it, long enough to trigger scroll.
And then you'll see horizontal scroll when you trigger scroll to this
paragraph.
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