The LDAP/X.500 pop-up form is largely self documenting. Online help can be obtained using the HELP key or by entering CTRL/G. The cursor keys are used to move from field to field or within fields; when each field is entered it is highlighted and a description of the field shown towards the bottom of the screen.
Use the FIND key to search for a directory entry matching the information supplied with the form. If any matches are found, a selection menu will be presented from which to choose the desired matches. If the currently selected form field is blank when the FIND key is pressed then all possible choices for that field will be presented. While in a selection menu, the question mark key, ?, can be used to request detailed information on the currently highlighted menu entry.
Note that only the information from the current field and any more general fields will be considered in the search. Thus, if FIND is entered while the State field---the second most general field---is highlighted, then only information from the State and Country field will be used in the directory search. The ordering, from least to most specific, is Country, State, Locality, Organization, Department, and Name.