How to snapshot a single parameter in multiple tracks (S8.5)?

[size=3 font="times new roman"]How do you simultaneously select a single parameter in multiple tracks?
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[size=3 font="times new roman"]I want to take a snapshot of the volume settings for all tracks.  To do this for one track only is easy -- select the track, click on the volume slider, right-click on it and select Automation Write Enable, then hit the snapshot camera icon.  But with multiple tracks selected, I have to select and arm the volume sliders one by one.
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[size=3 font="times new roman"]Must be an easier way. What am I missing?
[size=3 font="times new roman"]Thanks!
[size=3 font="times new roman"]    Frank

Thanks, tparker ... my apologies for not getting back sooner, and also for the "font" junk in my original posting (have no idea where that came from!)

Your solution helps, but I still have to go to each track, one by one, right-click on the volume slider and select Automation Snapshot, even when multiple tracks are selected.  I've tried it with Ctrl, Shift, Alt and various combination, but no go. It seems strange that to take an Automation Snapshot of the Volume setting for a 20-track song (at the same Now time, of course), you have to go thru 40 mouse clicks.

Any other ideas?

Thanks!