How to edit multi-version font (N/B/I/BI)

Maybe this question is stupid, but I didn’t found it here as well as in program help.

I wanted to add some special characters to a font which contained all four versions Regular/Bold/Italic/BoldItalic. (Not faked by Word - I can see it on some specific fonts as italic “a”)
But when I opened the font in Font Creator, I see only the Regular version. How can I switch to other version Bold/Italic/BoldItalic?
And when I saved the font whith my own name, then there was only the Regular version. How can I save the font so that all versions are included?

To manage fonts I use Bitstream Font Navigator. The source font displays there with all versions but my edited font displays only Regular.

One TTF font file only contains one type style. You need to add your character to each font style separately, e.g. arial.ttf arialbd.ttf, ariali.ttf, and arialbi.ttf.

Of course!
Now I have found appertaining font files. I knew that it would be so simple.
:laughing:

Thank you for prompt answer.