The Changes dialog specifies various options for highlighting recorded changes in documents.
To record changes to your work, choose Edit - Track Changes - Record.
Defines colours for recorded changes. If you select the "By author" entry, LibreOffice will automatically set the colour depending on the author who undertook the changes.
Specifies the color for changes of cell contents.
Specifies the color to highlight deletions in a document.
Specifies the color to highlight insertions in a document.
Specifies the color to highlight moved cell contents.