3.3 Builtin Label Environments

RefTeX needs to be aware of the environments which can be referenced with a label (i.e., which carry their own counters). By default, RefTeX recognizes all labeled environments and macros discussed in The LaTeX Companion by Goossens, Mittelbach & Samarin, Addison-Wesley 1994.. These are:

If you want to use other labeled environments, defined with \newtheorem, RefTeX needs to be configured to recognize them (see Defining Label Environments).