Bracket Completion and Matching
Bracket completion is a visual tool that the editor view uses to indicate you
which bracket matches which. If you open any .tex file, and select any
bracket, whether it be a parenthesis (), square brackets [] or braces {}, the editor will
highlight the bracket and its match in yellow (this default color can be changed). So, for example,
you can position the cursor on the braces in \section{Introduction},
you would see \section{Introduction} in the default yellow highlight,
showing you the location of the beginning and ending brackets.