Currently Being ModeratedOct 1, 2013 9:25 AM (in response to keith woolford)
Create a new (empty) sequence with the correct Sequence Settings you want.
Return to the old sequence with the incorrect Sequence Settings, click anywhere on the timeline, and the type Command + A to select all the clips, then Command + C to copy them.
Now click anywhere in the new (empty) sequence you created, and type Command + V to paste all the clips.
If the clips are now sized incorrectly, then click on a clip in your new timeline and type Command + A to select all the clips in the timeline.
Control-click on any one of the selected clips in the timeline, and from the drop down menu choose "Remove Attributes"
When the Remove Attributes Pane opens, check the box for Basic Motion, and click OK.
This will remove the scaling on all the selected clips.
Currently Being ModeratedOct 1, 2013 10:14 AM (in response to Meg The Dog)
Only I couldn't get them all to change in one go. I found it easier (?) removing the old/odd size frame by clicking the Reset buttons in the Motion tab for 'Scale' and 'Crop'.
Fortunately, the number of clips allowed a relatively swift removal of my mini-panic and the restoration of the sequence!
Currently Being ModeratedOct 1, 2013 10:29 AM (in response to keith woolford)
I meant to say 'Distort' not 'Crop' in the Motion tab.