# Project Properties Window: CSS Preprocessors

You can use this panel to specify the directories that are watched by the CSS preprocessor for your project and the directory where the generated CSS files are saved. It also enables you to specify mapping for individual files (for example, my.less -> your.css).

This panel contains the following elements:

Value | Description
--- | ---
Configure Executables | Click to open the CSS Preprocessors tab in the Options window.
Sass | Select this tab to edit the input and output directories of the project that are used by the Sass preprocessor. The table displays the default directories that are used by the preprocessor.
Compile Sass Files on Save | When selected, CSS files are automatically generated by the Sass preprocessor when the LESS files are saved.
LESS | Type in the text field to modify the name of the application. The table displays the default directories that are used by the preprocessor.
Compile LESS Files on Save | When selected, CSS files are automatically generated by the LESS preprocessor when the LESS files are saved.
Recompile All Files | Click to force recompiling of all Sass/LESS files of the project.

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Developing Applications with NetBeans IDE,

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