Have had this issue for a long time in FCPX where when I'm editing in the timeline and then want to zoom in or out of it, it will zoom in or out of the viewer instead.

Back in the FCP7 days, I got used to editing in the timeline and then quickly hitting the keyboard shortcuts to zoom in or out of the timeline

In FCPX, even if I have the timeline as the "active" window, whenever I do a trim, the viewer suddenly becomes the active window and I have to click back in the timeline to make it active before I do the keyboard shortcut to zoom in and out.

In the latest build FCPX 10.2.2 and OS X El Capitan, the issue seems worse, as not only trimming a clip will make the viewer window active, even the simple task of moving a subclip around will also make the viewer window active.

Has anyone run into this and possibly have a workaround?

Odd, does not happen to me. I have the viewer on a second monitor which may be why it does not do that.

Has anyone run into this and possibly have a workaround?

Holding the "Z" key and drawing a marquee works pretty well.

Was playing around with it some more and found something interesting when I am zoomed in on the timeline to trim a clip. Immediately after trimming a clip, if the mouse pointer is still touching the track, the viewer window will be highlighted and stay highlighted. If I hit the keyboard shortcut to zoom out, it will zoom out in the viewer.

If after trimming a clip, I move the mouse pointer into the blank areas above or below the track, the timeline window will become active again and the keyboard shortcut will zoom out of the timeline as it should.

Not sure if this is a bug or a "feature" :-/

Same issue with using the Color Board so I assigned GOTO TIMELINE to up-arrow. Never noticed position of mouse, but you may have found it makes a difference.

Ill ask this here to save on a new thread, apologies if its the wrong thing to do.

Would anyone know a way to map zooming in and out of timeline to the scroll wheel on a standard mouse?
Would just be superb if possible.