Step Sequencer 2.0 change without modify everything

Hi , i have sonar 8.5 producer, ans step sequencer 2.0.
I want to know how to modify a 4 measure step sequencer in the same track ,(for example session drumer track) without modify all the other's.

When i create a 4 measure (or other) drum step sequencer, and i copy and paste that 4 measure to all the track,  normally i want to change one or  other.
But to do that it gives i little work. i have to create another by hand, or save the old, and load in step S. and change some thing's.
i have try bounce to clip, and create a new Step S. and drag into, but the bounce clip change too.
It's boring, there is another way, that just open the step S. and change some notes whithout change everything?

Well, no one know, does anyone know if sonar X1 fiz this ?

I had a look at the manual:

To Unlink Copied Step Sequencer Clips
When you copy step sequencer clips, all copies are linked to each other.
This means that any further edits to any of the clips will be automatically
reflected in all other linked sibling clips.
If you wish to edit one instance of a step sequencer clip without affecting
any other clips, you must first unlink the clip you wish to edit:
1. Right-click the step sequencer clip in the Clips pane to show the Clips
pane context menu.
2. Select Unlink Step Sequencer Clips from the context menu (point the
mouse over the bottom of the context menu in order to show any
“hidden” commands).
The clip is now unlinked from the other clips.
Tip: If you frequently need to unlink step sequencer clips, assign the Unlink Step Sequencer Clips to a key binding.