The ‘\picture’ does not offer text substitute (too much pain to create them). Also note that ‘\Picture+{}’ puts the picture in a box, but not so ‘\Picture+[]{}’
DON’t we need in the following \LaTexEnv
<..latex ltpictur..>
\let\lt:pic=\picture
\def\picture{%
\ifx \EndPicture\:UnDef
\a:picture
\let\end:lt:pic=\endpicture
\def\endpicture{\end:lt:pic \b:picture}%
\else \let\EndPicture=\empty
\fi\lt:pic}
-_-_-
Picture environments, and other also, can be indirectly nested in setbox comamnds. Hence the setting of \EndPicture to empty for nested occurances of \endpicture.
<..latex ltpictur..>+
\NewConfigure{picture}{2}
-_-_-
The BR tag is used to force line breaks within text. Normally, linebreaks are treated as a space by browsers (except inside the PRE tag). The optional CLEAR attribute is used when you have an IMG image in your text. If that image uses ALIGN=LEFT or ALIGN=RIGHT, the text will flow around it. If you have text you want below the image, you can do this with <BR CLEAR=LEFT> or CLEAR=RIGHT to force scrolling down to a clear left or right margin, respectively. Using CLEAR=ALL will scroll down until both marings are clear. CLEAR=NONE is the default, and does nothing.