These mappings speed up typing European languages which contain diacritic characters such as a-umlaut etc.
+<l> expands to \v{<l>}
=<l> expands to \'{<l>}
where <l> is an alphabet.
+} expands to \"{a}
+: expands to \^{o}Latex-Suite also ships with smart backspacing functionality which provides another convenience while editing languages with diacritics.
Diacritics are disabled by default in Latex-Suite because they can sometimes be a little too intrusive. Moreover, most European users can nowadays use font encodings which display diacritic characters directly instead of having to rely on Latex-Suite's method of displaying diacritics.
Set the g:Tex_Diacritics variable to enable diacritics.