How are custom plays stored?

If I create a custom play in the college game, is there a way to save that play and use it in the pro game? Or do I have to export the entire playbook (or gameplan)?
Or if I start a new (second) league in the college game will the custom plays still be there from the (first) league.

I just do not want to create 80-100 plays and then not be able to use them from Game (College) to Game (Pro) or League to League.
IF you cannot do this, is there an easy way to export your custom plays from place to place and kind of keep them with you.

I hope all those questions made sense. Thank you in advance for any input.

yea, there is an export and import button when you create custom plays... but to be honest I don't think we've done a lot of testing of creating in CF and then using them in PF. The actions may not line up perfectly so some plays may not work when imported in that way.