
Enter the User Defined Languages (or “UDL” for short): the UDL interface allows the user to define rules for formatting normal text, keywords, comments, numbers to define delimiters (like quotes around strings or parentheses around lists) which will cause text between those delimiters to be formatted and to define symbols or keywords that can be used to allow folding (on-demand hiding and unhiding of blocks of code or text). However, not every possible language or formatting style is available. Notepad++ comes prepackaged with many Language lexers, which apply syntax highlighting to source code or textual data.


User Defined Languages What are User Defined Languages
