- Highlight Matching Brackets - Check (the default) to enable matching of brackets. For a description, see Bracket Matching.
- Convert new tabs to spaces - Check to have any new tabs replaced with spaces while editing. (Off by default.)
- Convert existing tabs to spaces during save - Check to have any existing tabs replaced with spaces when a file is saved. (Off by default.)
- Remove trailing spaces from line during save - Check to have any trailing spaces deleted from lines when a file is saved. (Off by default.)
- Clear undo buffer during save - Check (the default) this box to discard the history of changes when saving the file. If this box is checked, you cannot use Edit->Undo to remove changes after saving the file.
- Auto indent on new line - Check (the default) this box to have lines you add automatically indented to the same level as the previous line in the source file. If you uncheck this option, new lines are not indented.
- Auto copy on select - (X Windows only) Check (the default) this box to enable automatically copying selected text.