Is ‘Power Windows’ the official term?
Here’s that Luke Cantina Power Window in action and de-action:
Here’s the post Jabba re-timed wipe. In 2004 it’s 3po, in 2019 it’s Boba to the left of Obi.
Another example of the different pixel aspect ratios between variations:
In one frame of the Death Star approach shot, two frames got doubled up:
Lucasfilm recolored one of the bulkheads when Luke and Leia swing: (3 shots)
When is a shot purposefully reframed?