If you check Character Code at Cursor checkbox in the Status tab of the Customize dialog box, and when the cursor is at end of any line, you will see 0D+0A (CR+LF) or 0D (CR only) or 0A (LF only). You can also check Show CR and LF with Different Marks in the Marks tab of Properties to distinguish the return types. Since each line can have different return types in EmEditor, this is how EmEditor displays the return types for each line.
To clarify how the Save As dialog works, it displays the current return method only when the entire document contains the same return method. If mixed return methods are used, No Change will be first selected.
However, I might think about adding the entire document’s return methods (CR only, LF only, CR+OF, or mixed) in the status bar. :-)