This applies to inputting dimensions as well typing commands. For example when I am drawing a rectangle and press the @ symbol, the two dimension boxes appear, however, as soon as I begin typing the boxes disappear. Same goes with the command bar. As soon as I begin to type, a single letter appears for a fraction of a second, then the box disappears. The command bar itself is on the screen, The issue is NOT the Dynamic Input setting. I have turned this on. I have read every related forum post and nothing has solved my problem. Using 2018 AutoCad LT for Mac. I have tried restarting AutoCad, I have tried restarting my computer. Nothing. I have come across this issue once before, but in the previous case, the Dynamic Input mode was accidentally toggled to 'off.' Fingers crossed someone out there has a fix for this!