Hi Sam
"In v4.10, you can right click on the clip, select Flip->Horizontal."
As noted above, this option is only available in the Media list window. Nevertheless the flip effect transfers to the timeline thumbnail as well as the timeline clip if it has been added. But why has it been incorporated in the Media list menu and not the timeline clip right click menu, as now we have a conflict?
Imagine you want to invert a clip....No problem...You can do it as you suggest and Flip the thumbnail vertically in the media list.
Sure enough the thumbnail and your clip if added to the sequence line does the same, (or you can drag and drop it in its inverted state from the media list.)
Now, let's say, a little later during editing and you want to add the same clip again but this time the correct way up...You can't re-flip the media list thumbnail as that will re-flip the clip that you initially inverted and placed on the timeline!
Your only option now is that you will have to add it again but this time in its inverted state and then reflip it....Ah!....But...that means using the rotate effect on the inverted clip since the menu flip option doesn't appear for clips on the timeline.
So why not make it a rule that Effects can only be added to clips already on the timeline? Or if that's not possible -- I personally think it is more logical -- , why not incorporate the flip option in the timeline clip right click menu?
Nat