expand markers on clip or audio

I can use markers on timeline, clip, nest or audio. Fine. 

Expanding Markers on timeline is easy with option & mouse

But on the clip, the option button means copy and can't be used to expand markers.

Of course, I can change the time "beginning - end" in. the marker window "m" or use the marker-window on the right side, but is there a possibility to expand markers with mouse, like on the timeline?

thanks