A student who is marked as absent, then checked in is now not in 7th hour - how can you mark skipping?

When there is already an attendance code in the Out field and you need to enter an additional one for a Tardy or a Skipped, you should click in the Out field and choose Post New Tardy-To-Class if the student is Tardy or choose Post New/Multiple Checkout(s) if the student is Skipping.