i keep *trying* to move from portupgrade to portmaster

[Mike Jakubik]

  I tried portmaster for myself and im wondering how to get the 
functionality of "portupgrade lib\*", meaning update all libraries that 
need updating. With "portmaster lib\*" it tries to update and rebuild 
all libraries, how can i tell portmaster to only update what needs 
updating? I can't find such an option in the man page, there is an 
option to always rebuild but no option to never rebuild. There is also 
-i, but it's a pain in the ass to manually select y/n for all libraries. 
Am i not seeing something in the man page?