-extern bool changeDepth(BufferView *, LyXText *, DEPTH_CHANGE, bool test_only);
-
-///
-extern void emph(BufferView *);
-///
-extern void bold(BufferView *);
-///
-extern void noun(BufferView *);
-///
-extern void lang(BufferView *, string const &);
-///
-extern void number(BufferView *);
-///
-extern void tex(BufferView *);
-///
-extern void code(BufferView *);
-///
-extern void sans(BufferView *);
-///
-extern void roman(BufferView *);
-///
-extern void styleReset(BufferView *);
-///
-extern void underline(BufferView *);
-///
-extern void fontSize(BufferView *, string const &);
-/// Returns the current font and depth as a message.
-extern string const currentState(BufferView *);
-///
-extern void toggleAndShow(BufferView *, LyXFont const &,
- bool toggleall = true);