Final Fantasy Hacktics

I'm new to this, but do we know what these markers in the ENTD do? There's also a blank one in between the two?

Then there's a bunch of markers missing or unknown in the ability section. Anyone know what the boxes under Learn with JP, Action?, Learn on Hit do? There are 5 blanks and 4 unknowns...

Sorry if its been asked and answered before, I did a forum search but couldnt get it.

Save and load formation are used with guest characters, basicly, the two funcitons allow you to have guest characters enter the party, while allowing you to edit thier equipment, jobs and abilitys, but still not control them in battle.