Use this tab to set the locations of the LilyPond and PDF reader (for example, Adobe Reader) programs that are installed locally on your computer.

Select the "choose location" links and navigate to the program's location, or enter the fully-specified location (file name including the folder/directory path) in the text box.

Select the executable program itself as the location, rather than just the folder/directory the program resides in.

These values are required for some conversion operations:

If these locations are not set, then, respectively, conversion to PDF is not available in the tool, and the "Open PDF file on completion" option for PDF conversion is not shown.