Precision Editor.

Hello,

I am trying to use precision editor to trim two conected clips (conected clips,not in
primary story line) but I didn't figured out how to do it.. even if I create a storyline for
these clips,it is not possible to trim using precision editor.

that's it? it's not possible? or it's a bug?

thanks

Precision Editor works in any Storyline, not with connected clips. But that said, you should use T to get the Teim tool and learn to use Ripple, Roll, Slip, Slide before ever going to the Presicion Editor. It's faster, easier, and can be frame accurate.
help.apple.com/finalcutpro/mac/10.0.1/#ver1632d3c8

Ignore the Blade tool, ignore Extend or Shorten in this section, go directly to the Trim Tool doing Ripple, Roll, Slipe, Slide. Life will become much more plesant and easier.