Github user LantaoJin commented on the issue:
https://github.com/apache/spark/pull/22595
@srowen The checkbox is what I add in this PR to display/hidden the columns
which have been hidden always. These columns are on heap memory, off heap
memory. If we want to display them in executor page, we have to change the css
file and rebuild the spark-core.jar file. Besides, there should be more and
more columns being added in future. Ref
[SPARK-23206](https://issues.apache.org/jira/browse/SPARK-23206),
[SPARK-23206](https://issues.apache.org/jira/browse/SPARK-23206). If all of
them are visible all the time, this page won't be brief like this. So we can
simply add a checkbox to let user display them on demand and hidden by default.
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