At Admin Panel -> Settings -> Switches you have the option to turn on macros for members. This will create a section in everyone's member home where they can specify that a short keycombo of their choice should be replaced automatically with a longer keycombo. These can involve BB Codes, so the user might for example map "example" to "example" to automatically underline a term they use.

Most users will have no use for macros, but you and some power-users may find them very handy at saving you time on repetitive tasks.

Macros apply to article descriptions, category descriptions, comment text, private messages and chat messages.

In WSN KB they apply to article text, of course.