The first thing you should always do after installing software (apart from viewing the manpages) is to check and see if it supports plugins. If you are not a programmer or hacker it really is the easiest way to extend capabilities. The Gnome text editor supports this feature out of the box.Here's three of the best.
Gedit is a text editor. The Gedit homepage list its full feature set.. It's my editor of choice when writing articles for FSM. By default, Gedit comes with bundled plugins but you can extend them via your distro's package manager. Search for
gedit-plugins, install it, open Gedit and select
Edit > Preferences. Click on the Plugins tab and scroll through them, checking the ones you want.