Therefore, the number of characters in a line depends only on the window width and on the font used. Consequently, it is not possible to insert a space or a tab at the beginning of a line. To insert spaces or tabs it is necessary to press Ctrl-q before entering them. Esc a moves to the beginning of the first line containing the previous latex begin, part, chapter, sub sub section or sub sub paragraph keyword. Tab indents the current line.
Return inserts a newline and indents.
Esc i indents the current region. To automatically set the Latex mode when a file is loaded, use the suffixes .tex or .latex .