Constructing '1.2 Perpendicular Bisector', I got stuck trying to use the hot key T. I switched to 'explore mode' to see the hint and realized I could complete t

Constructing '1.2 Perpendicular Bisector', I got stuck trying to use the hot key T. I switched to 'explore mode' to see the hint and realized I could complete the task using a compass. Then, on the next screen I 'discovered the Perpendicular Bisector tool'. Maybe greying out the different tools at the bottom would make the locked tool more apparent during the tutorial--I almost abandoned the site, but stubbornness compelled me to try again. hehe.