Checked, you get the more-elaborate Save dialog that includes the blinkless (radio) buttons, checkbox or pull-down that give/s a selection of line-endings;
Unchecked, you get the ordinary Save dialog, and the line-ending setting from your Preferences is applied to the file when saved.
Hope this clarifies it.
Well, I got that part from the first post. The question was a little deeper. What I'm trying to understand is what benefit would it introduce comparing to current implementation.
Right now you have an option to set default line endings - Save local/remote as UNIX. So you can set DOS or UNIX format by default. Mac is not available as a default option but I don't think there are many users of CE who want Mac as a default
Imagine you have an open file with UNIX line endings and you don't like it. Either you opened an existing UNIX file or you created a new file as a UNIX file (because your default option is UNIX) and you want to save it as DOS.
Imagine that "Enable format change in dialogs" is there.
What should be the default setting for the list box in the Save dialog?
Should it match existing line ending format?
If yes then what do we gain? We can still do it through Document menu.
Also unless you are doing "Save As" or you have a new file you will not see "Save" dialog. You will still need to change the format through the Document menu.