Eldritch Knight on Character Sheet, Help Please

I made an Eldritch Knight in my 5e game, but I don't know how to get the character sheet to recognise Eldritch Knight, and have the Spells page update correctly for Spellcasting ability, Spell save DC, Spell attack bonus, and spell slots.  I can manually change everything except the Spell Slots Total isn't editable and remains at 0.  Does Roll20 have support for Eldritch Knight? How do I set this up properly? Thanks 

Others can probably answer the sheet usage question better than I, since I don't use it very often. As a preliminary couple of questions, though: Have you purchased the Players Handbook, and are you using the Charactermancer? Eldritch Knight is not a subclass available in the SRD, the freely available rules released by Wizards of the Coast.

If you are using the OGL sheet by Roll20 then there is a checkbox in the options tab. It's on the left side, top box, second from the bottom, it's labeled "Arcane Fighter". If you check that it should give you spell slots and calculate a spell save DC.

Thanks very much.  That worked.