Instead of process explorer, I highly recommend people to use Process Hacker[0]. It's open source, contains a lot of information missing from process explorer, and has a much cleaner user interface.
Another great one is WinObjEx64[1], which allows exploring the NT namespace.
Another great one is WinObjEx64[1], which allows exploring the NT namespace.
[0]: https://github.com/processhacker/processhacker
[1]: https://github.com/hfiref0x/WinObjEx64