Editing GNU TeXmacs (section)

=== The TeXmacs editor ===
In the TeXmacs editor structure and appearance of the document are represented at the same time;<ref name=":1">{{Cite journal|last=van der Hoeven|first=Joris|title=GNU TeXmacs, A free, structured, wysiwyg and technical text editor|url=http://cahiers.gutenberg.eu.org/cg-bin/article/CG_2001___39-40_39_0.pdf|journal=Cahiers Gutenberg|volume=39-40|pages=39–50}}</ref> the structure is made evident to the user by surrounding logical units of the document in nested focus frames carrying color cues that are displayed according to the movement of the cursor.<ref>{{Cite web|title=The TeXmacs manual. 2.2, Typing structured text.|url=https://www.texmacs.org/tmweb/documents/manuals/texmacs-manual.en.pdf|access-date=2020-11-20}}</ref> A detailed description of the structure in the proximity of the cursor is provided in the footer of the editor window, finely selectable with left-right arrow presses.<ref name=":1" /> In the editor it is possible to switch between text mode and source mode editing, and support for the composition of macros is present; the source editor is [[Structure editor|syntax-aware]].<ref>{{Cite web|title=GNU TEXMACS user manual; 11.2. Rendering of style files and packages|url=http://www.texmacs.org/tmweb/documents/manuals/texmacs-manual.en.pdf|access-date=2020-11-27}}</ref>