ALL KEY BINDING FOR BOTH ARMA3 AND ACE ARE AT ITS DEFAULT AND HAVEN'T MESSED IT WITH ANYTHING ELSE. It is extremely stressful when you're trying to take out multiple enemies on the move, trying to measure distance changing to Vector(which seems to work fine when measuring distance since it measures it with 'R' key(and in this case, the 'TAB' key which measures elevation of the target also seems to work fine). The range in meters should now appear at the bottom of the screen. Whatever Optic or Binocular that measures distance w/ 'TAB' key doesn't function at all. Sight the target and Hold R until TARGET AQCUIRED appears on top of the screen. I think i’ve tried every published mission using that mod on steam or bis forums. I have played hundreds of hours on Ravage mod. The Armasight Binoculars are a precision. I’m proud to introduce you my first public mission released on Arma 3 (the last time i shared missions on the internet was for the first Operation Flashpoint ). IT IS ONLY THE 'TAB' KEY DISTANCE MEASURING FUNCTION NOT WORKING. Before operating this product, carefully read and study this Operation and Maintenance Manual. The ones w/LASER measuring w/ 'left mouse button' works fine. Rangefinders that doesn't work are only the ones with 'TAB' key distance measuring ones wo/laser. I loaded the game from the launcher(STEAM) wo/ACE3 and it works just fine, but when I do load it w/ACE3, doesn't work anymore. Rangefinders and optics such as Nightstalker and TWS that has distance measuring functions. I'm guessing it stopped working since the last update(3.4.2.0) since I noticed it just today and I play nearly everyday. Binoculars and Optics w/ range measuring functions DO NOT WORK anymore that reads distance and range with 'TAB' key/