Missing Command Line / Dynamic Input
Issue
The AutoCAD Command line is missing, or you want to be able to type Command line text wherever the cursor happens to be (otherwise known as Dynamic Input).
Solution
The Dynamic Input option is available in the AutoCAD Status Bar toggles (in the lower right corner of your CAD interface). It's the option pictured to the right.
Make sure this option is enabled and turned on. Here's how >
Once Dynamic Input is turned on, you can turn the Command line back on (if you want) by typing CommandLine at the cursor location and pressing Enter.