If all of your stills are the same dimensions...
Scale & position one of the stills as desired, right-click, select 'Copy'.
Select another still (or multiple stills), right-click, select 'Paste Attributes'.
If all of your stills are the same dimensions...
Scale & position one of the stills as desired, right-click, select 'Copy'.
Select another still (or multiple stills), right-click, select 'Paste Attributes'.