Certain keyboard shortcuts are not responding (e.g.: left/right arrows for back and forward) The stop/start bar command and "return to start" comma functions are working, but no others. Any idea why?
OSX El Capitan 10.11.2 (15C50)
iMac (Retina 4K, 21.5-inch, Late 2015)
Processor: 3.1 GHz Intel Core i5
Memory: 8 GB 1867 MHz DDR3
Graphics: Intel Iris Pro Graphics 6200 1536 MB
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