Right click, but since the status shows off its on or off, a simple click would work.
Anyway, I'm not developing this node and I have no expectation that anyone else will.
Just pondering alternatives.
logIO version 1.2.0 released: node-red-log-io (node) - Node-RED
- adds output port (in all modes, so it never breaks chain between connected nodes) and passes input messages forward
- moves button on top of the node
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Sorry for slow reply - personally I find that even worse than the overlayed button/port. But yeah - it's not about me 
(but the hiding is good so not too intrusive)
I like this direction for Node-Red. Spent a bit of time with https://nifi.apache.org/ and liked some of the cross-cutting flow control and audit concerns it takes seriously and factors into pluggable repositories...Apache NiFi Overview
