The Save branch under Configuration - File Handling has the following options:
Write UTF-8 BOM header to all UTF-8 files when saved
This option instructs the editor to write the UTF-8 BOM (byte order mark) to all files when they're saved. If this option is not set the BOM will not be written to the file when it is written to the disk. This will not remove a BOM that already exists in the file.
Write UTF-8 BOM on new files created within this program (if above is not set)
This option instructs the editor to write the UTF-8 BOM only to new files created within the editor when they're saved. If this option is not set the BOM will not be written to the file when it is written to the disk. This will not remove a BOM that already exists in the file.
Trim trailing spaces on file save
This function causes the editor to automatically remove the trailing white space (spaces/tabs) from the end of every line in the file and positions back to the original cursor position when it is complete each time a file is saved. The functionality of Trim Trailing Spaces is such that it does require a newline to operate on a given line of text. If the last line of text in your file is terminated with a hard return, Trim Trailing Spaces will work on that line as well.
Remember last directory specified for Save As for session
If this option is selected, then a Save As operation or saving a new, unsaved file (i.e. "Edit1") will default to the last directory specified for a Save As operation.
If this is not selected (or if a directory has not yet been specified), a Save As operation for saving a new, unsaved file will default to the directory the last file was opened from using the Open command in the current or previous editing session.
The Save As dialog always opens in the directory of the named file when working with a file that has already been saved.
Always set Encoding to "Default" in Save As dialog
If this option is selected, the Encoding dropdown in the Save As dialog will always be set to "Default" when the Save As dialog is invoked. If this option is not selected, the Save As dialog will remember the last option selected when the Save As dialog is invoked.
Automatic Save
The option is provided to automatically save all open files at the desired interval. The interval is configurable in minutes. If the interval is set to zero (0) no automatic save is performed.
If Do not auto-save unnamed (new) files is selected, the automatic save will ignore files that do not have a name (i.e. files that were created with the New command). This stops the Save As dialog from appearing if an unnamed file exists and has been modified.
If Do not auto-save FTP files is selected, the automatic save will ignore modified FTP files that are open for edit.
If a file is saved due to the automatic save command a . BAK file is only created for the first save of the session. For subsequent saves with this feature the . BAK file is not created or overwritten.