Ok I realised what the problem is. If the text you've added is not
actually visible within the frame of the 'edit' composition at any given
point in the video, it is not rendered in the 'output' composition.I
don't know if this is a Mettle bug or my mistake (I imagine the latter),
but either way it's annoying and as I'm on a deadline I've had to move
some of my text around just to make sure it's all in the Edit frame when
I render the Output comp.Will update if I realise what's wrong.M