Signal capturing on unused pin

[Harvie]

Some unused pin might be signaling HIGH when capturing data. That way we can connect LED or even sync this arduino analyzer with another analyzer using trigger, so they both start capturing at the same time.

[gillham]

Digital pin 7 by default is turned on before sampling data and off afterwards. Is this what you had in mind? Look at the DEBUG_ENABLE / DEBUG_ON / DEBUG_OFF definitions.
Or are you saying activate a pin as soon as the capture or trigger is armed and turn it off after? So if we are waiting for a trigger the pin would be HIGH (LED on) until the trigger fires and samples data?

Please describe what the feature would do in a bit more detail.