<\body> <\explain> <|explain> Typeset the , which must be , as an atomic line item. Hyphenation within the and special spacing handling on its borders are disabled. <\explain> <|explain> Floating insertions are page items which are typeset ``out of band'', they are associated to two boxes: the anchor box marks the structural position of the , the floating box contains the typeset operand. This facility is used by footnotes and floating blocks. The first and second operands are evaluated, but for clarity the first operand appears as a literal string in the examples. Since the is typeset out of band, it may be even if the occurs in . <\indent> ||body> produces a footnote insertion, this should only be used within the macro and is considered style markup. The floating box of a footnote is typeset at the end of the the page containing the anchor box. |where|body> produces a floating block, this is considered physical markup. The position of the floating box is chosen by the page breaker, which uses this extra freedom to minimize the page breaking penalty. The operand must evaluate to a string which may contain the following characters: <\description> Allow the floating box at page . Allow the floating box at page . Allow the floating box ``'', in the middle of the page near the anchor box. the floating box within the same page as the anchor box. <\explain> <|explain> This primitive marks for output only on the specified . The following values of are supported: <\description> The is typeset as usual line content. The , which must be a string, is not visible from within , but it will be included in a verbatim way when the document is exported to . Similar to the medium, but for exports. The is only typeset when the document is visualized on a screen. This may be useful to provide additional visual information to the user during the editing phase which should disappear when printing out. A similar tag which may be used for this purpose is . This medium is complementary to , when the should only be visible when printing out, but not when the document is displayed on the screen. <\explain|> In some contexts you need to embed uneditable data inside a document, most of the time this is uneditable binary data. The primitive makes it impossible to view or modify its subtree from within the editor.