The language summary window contains an n by 3 table. The rows correspond to symbols; the columns correspond to the symbol itself, the symbol inflected by ".", and the symbol inflected by ":". To invoke the language summary window, select Summary… under the Language menu.
Clicking on an entry invokes the help window with an explanation on that entry. Keying a symbol is equivalent to clicking on the corresponding entry. (For example, keying "+" has the same effect as clicking on the "+ Conjugate ΓÇó Plus" entry.) The tab and arrow keys move the selection.