euse takes a parameter "-p" for per-package USE-flags which is working fine, but is not mentioned in the man page. Is this an experimental feature or just forgotten?
-p switch was introduced Wed, 29 Dec 2010: http://git.overlays.gentoo.org/gitweb/?p=proj/gentoolkit.git;a=commit;h=258a81471b4106f12bafee2e5c0a5458e2db2280 Commit message references bug 259318.
I can confirm that the "-p" option is not documented in the man page. It is however documented in the help text, which you can get by executing "euse --help". There you can see that also other options are missing in the man page: -R, --remove -g, --global -l, --local There is also inconsistency with the "--version" option - in the man page there is the lower case "-v", but in the help text there is upper case "-V". Nevertheless, both options are working :-). And then there is wrong indentation in the man page for the last three options -a -h -v. Tested with app-portage/gentoolkit-0.4.8