History tree-sketch drop-down menu disappear from all features

Hi,

I was working in a model yesterday and when I came back to work on it today all my sketches are visible and don't have the drop-down menu. They all appear on-top of the feature that corresponds to each on them. I open a new part and works fine but in my current model it doesn't. How could I bring the drop-down menu back?

Any help will be appreciated!

Thanks,

-Luis

SolidworksDrawings And Detailing