arcpy.mapping exportPDF with ONLY one buffer ring turned on for associated iterated f

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I am exporting X number of maps iterating through a point feature class. Each feature class has a buffer drawn around them. I know how to export a PDF for each feature class at a fixed scale (if I lock extent the map just pans from one feature to another and works; however, if I don't lock the extent and write zoomtofeature code then the map never refreshes and I get the same extent for every iterated feature). I can get by that for now although it is frustrating. Here's my more pressing issue: how can I export a PDF for each feature but with only the associated buffer ring turned on and all others turned off? (many buffer rings overlap each other and I've been asked to produce just one ring per feature regardless of overlapping buffers from nearby features).

Thanks for looking into this and helping me.

Chris



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