Changing font size with shortcut key

I'm looking for either
a. a shortcut key for changing font size (MS Word uses Ctrl-[ or Ctrl-])

or
b. a macro that will do this (that I can associate with a shortcut key)

Any ideas?
Thanks.

o Open or start a document of a suitable type - probably text (Writer).
o Go to Tools | Customize... | Keyboard.
o Under Category, select Format.
o Under Function, select Increase Font.
o At the top right of the panel, choose whether the shortcut should apply to LibreOffice generally or just to one component - perhaps Writer.
o Under "Shortcut keys", select your preferred keyboard shortcut.
o Click Modify and OK.
o Repeat for Reduce Font and a suitable (different) keyboard shortcut.

I trust this helps.

Brian Barker

Thanks. Just what I needed.