It might just be paranoia...

[MaynardX]

I racked my beer into the secondary today and realized I don't quite have 5 gallons (must have miscalculated the boil off). So, now, I have about a 2 inch gap of air in between the top of my beer and the top of the secondary. Should I worry about oxidation at this point? Should I go ahead and bottle now? Or, better yet, maybe add a little corn sugar to kick up a little fermentation to move out the oxygen? Or, is it just paranoia????

 

[ChshreCat]

I say let it be. Even if it's completely done fermenting it will likely offgas some CO2 after you rack it so it'll still have a little layer.

 

[Nurmey]

I say the same as the grinning cat, leave it as is for a couple weeks.