Miscellaneous switches. There are:
Show the common close button - show or hide a big button (near the main menu) which closes the current document.
Restore the last session on start - when this option is enabled, TEA saves the session on exit and restore it on start.
Save all on the abnormal termination (SIGTERM, SIGHUP, SIGABRT, SIGINT) - save all currently opened files if an abnormal termination happen. But if the memory was corrupted, the corrupted data may be saved. Default: off. But I think that more wise will be use the crash-file and the Save the crashfile on terminate. It is similar to the previous one option, but it works with a single file only (the current one), and the text will be saved to the special file called crash_file which is located at the TEA configuration directory. You can open it later from File > Manage utility files > Open the crashfile.
Determine a scripts highlighting by the content - it is for the syntax highlighting. Turn it on, if you want to auto-highlight Bash-scripts which are without the .sh-extension.
Use snippets - snippets works if this option is turned ON. For what is that? In some cases you may fund that TEA scans snippets directory to slowly, and maybe you want turn it off temporary.
Show line numbers - to show them or not to show by default.
Word wrap - to wrap words or not to wrap - yes, by default.
Scan for links on file open. If on, then TEA will scans local links automatically on file open. By default is off.
Do backup - Check this box if you want TEA make backup on file save.