You can rearrange items or set which items appear in the iMovie share menu.
Do one of the following:
From the Projects browser: Tap the movie or trailer you want to share.
If you’re editing a project: Tap Done (in the upper-left corner) to return to the project details screen.
Tap the Share button 
, then tap More from the middle row of options.
Do one of the following:
Show an item: Tap to turn it on.
Hide an item: Tap to turn it off.
Rearrange items: Drag the Rearrange button 
for each menu item you want to move.