This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)

$FrontEndSession

$FrontEndSession
is a global symbol that represents the current session of the front end from which the kernel is being run.
Make cell brackets thick for the current session:
Reset the brackets to their initial thickness:
Make cell brackets thick for the current session:
Reset the brackets to their initial thickness:
New in 6