If you hover over your code in Understand it will tell you about what you are hovering over. This article shows examples but is not comprehensive by any means!
Note: I’m using C here, but this works for any language we support.
Hover over a function:
Hover over an include to see the full path to the file being included:
Hover over a macro to see it’s value at that point in the code:
Hover over a variable and see what type it is:
Hover over an enum and see it’s value:
Hover over a global object and you’ll see it’s latest assignment: