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I am trying to resize two mov layers together. I would usually select both layers, hold shift to maintain their shape and drag the scale slider or layer corner inwards/outward. When I tried this the two objects changed scale at different rates and ended up quite different to each other? this only occurs when mov files are in the composition; on a separate comp with solids scaling works fine. How do you resize two mov at the same time?

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    I'm guessing they have different z positions but it's hard to know without seeing the file. – Cai Apr 22 '16 at 18:01
  • That's what i thought but they aren't 3d – Chris Hawley Apr 22 '16 at 18:02
  • Could you upload a screenshot of the layers? – Cai Apr 22 '16 at 18:05
  • Well I can't reproduce this at all.. Just to clarify, when you say they scale at different rates, do the actual numbers scale correctly? – Cai Apr 22 '16 at 18:26
  • Ok, I think I may understand your problem... this for example, IS scaling correctly. Is that what is happening and not what you want? – Cai Apr 22 '16 at 18:30
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The problem is that the layers are scaling at the same rate. If you look at the actual scale values. For example, if you have one layer at 100% scale and another at 90% scale, then select both and resize to 50%, the layers will be at 50% scale and 40% scale, so they have both had their scale reduced by 50% of their total 100%, not 50% of their current scale.

You can see the default behaviour here:

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As far as I'm aware this is just how After Effects work and you can't change it. There are 2 main ways to get around this:

1. Pre-compose.

Select all the layers you want to scale, right click and select Pre-Compose...

2. Null Layer.

Create a new Null Layer (Layer → New → Null Object). Select all the layers you want to scale and parent them to the Null Object (drag the little icon under 'Parent' in the layers/timeline to the Null layer).

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