A jump is a reference to a declaration, where the reference appears in informal text between Z paragraphs. The reference is marked-up specially so that it can be typeset the same as the Z name, and be selected and inspected. A jump can refer to any declaration that is in scope, i.e. is declared earlier at top-level, and can also select a declaration within a schema.
The troff mark-up of a jump is either of the following, on lines by themselves.
.ZJ RefName .ZJ RefName . RefName
The LATEX mark-up of a jump is either of the following, on lines by themselves.
\verb! \verb!
A knob is for use in place of a jump that precedes the declaration to which it would ideally refer. The knob introduces a pseudo-declaration, which can be overridden by a subsequent Z declaration. It can also be referred to by subsequent jumps. A knob is marked-up specially so that it can be typeset the same as the Z name, and be selected and inspected.
The troff mark-up of a knob is as follows, on a line by itself.
.ZK NAME
The LATEX mark-up of a knob is as follows, on a line by itself.
\verb!