Preview problem in timeline

[Silvia Torre Cambón]

When I hold a clip, before dropping it in another part of the timeline, the arrow symbol of the mouse shows a preview of the clip i am dragging.

Well, out of the blue, it does not work anymore. I can only see the frames difference ("you are dragging this 22 frames ahead" for instance, and the symbol that shows me that I am dragging someting)

[Michael_FD_MM]

I have the same Problem. This is horrible!

Also i cant boxselect keyframes in the effects timeline. Only when i maximize the Window via doubleklick it this possible. 

[Michael_FD_MM]

Funny! Suddenly the functions work again! How is that possible?

[Ann Bens · Accepted solution]

At present, there is an issue with nested audio: delete or disable Show Audio Waveform.

[Silvia Torre Cambón]

Thank you! You are right.

It is strange bc it stopped working after activating the zoom tool... anyway, i will try to work like this without the waveform for a while during this stage of the montage. Thanks a lot.