The File handling » DOS/Unix/Mac handling branch of Settings has the following options.
This setting determines the default line terminator type for new files created within the editor; DOS (CR/LF, or hex 0D 0A) is the default. You can optionally set this to Unix (LF only, or hex 0A) or Mac legacy (CR only, or hex 0D).
By default the editor automatically detect and handles Unix/Mac line endings as new lines. This setting will force the editor to only recognize DOS terminated lines (CR/LF) as new lines. In this case, the Unix or Mac line endings are displayed as a space.
If this feature is used with a file that has mixed line terminators (and they must be maintained), it should be used without enabling automatic conversion to DOS format (above). If automatic conversion is set when editing such files, any occurrences of CR-only or LF-only will be converted automatically to CR/LF.
This option instructs the editor to automatically save the file as the original format (Unix/Mac) when saved unless you manually converted the file after opening.
If this option is selected and the file is automatically converted to DOS format when opened, the status bar will still indicate the file's original format (Unix or Mac) when the file is loaded.