As you know, you get the standard Hyphen dash by simply pressing the [-] key on the alpha-numeric keyboard.
To get the Minus, you simply press the [-] key on the numerical block of your keyboard.
With [Ctrl]+[Esc] (or [Control]+[^] in the WindowsPack), you can open the Character-set overview dialog to pick more characters which are not printed on the keys. The last four Atari TOS characters, shown in this dialog as [sup-n], [sup-2], [sup-3] and [macron], are used as these dashes in Calamus:
The same Character-set overview dialog can be called in Eddie but shows the Calamus Font equivalents then, not the TOS characters. They are also shown in another relevant Eddie dialog, the Word hyphen dialog.