Scaling Recorded Events Time Display in Playback Window

Is there a way to manually scale the display of the recorded events in "playback" window so that the bars representing recorded events are larger? The scale of my display is usually quite large, making the event bars very narrow and difficult to line up the timeline slider. The scale has decreased a couple of times when I switch from Live View to Playback, but then reverts to the larger scale when refreshed. Running OS X 10.10.5. Thanks!
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