Is there a way to change the font size in ROAR to make it larger? I don’t see an option.
If not, would that be considered for a future release?
There is no such option. I have filed a ticket [SPARK-1836] Add option to change font’s size for Roar popups - IgniteRealtime JIRA
But plugin’s author is not very active with Spark project, so i can’t say when it could be done. Unless someone else provides a patch. We don’t have many experienced active developers working on Spark.