This
thread shows me that editor-zooming does not work consistently.
The current implementation saves the last seen zoom-factor and uses it for all newly opened editors, except for the second control in split-view.
Editors that have been opened are not zoomed automatically.
In my opinion, zooming should either only affect the editor, that has the focus, or all editors (egally whether they are opened or not).
I attach a a patch, that does exact this (configurable via "Settings -> Editor... -> Other options -> Zooming resizes all editors").
Additionally it saves the zoom-factor and the split-state on a per editor base in the project layout file.
The patch is against trunk and conflicts with my mousewheel/double-click/etc-patch (
http://forums.codeblocks.org/index.php/topic,13826.msg94108.html#msg94108).
As always tester and comments/improvements/whishes ... are welcome.
Tested on debian 64-bit and winXP.
EDIT:
updated patch:
http://forums.codeblocks.org/index.php/topic,14027.msg94324.html#msg94324