I'm developing a number of sub-classes to fit the world I'm building. Essentially, it is a much lower magic game than a normal DnD game and classes like sorcerers and wizards don't exist. Instead, spellcasting ability it available through subclasses for fighters, rogues etc, or with hybrids like rangers. 

In developing these subclasses, I'm trying to figure out if there is a way to increase the max level of the spell and the maximum cantrips/spells known. Currently, regardless of whether I select half-level or full-level in the 'spell prepare type' drop down, at 20th level, the sublcasses seem limited to 3 cantrips and 13 spells of no higher than 4th level. I'm not seeing any variation of this regardless of which option I pick for 'spell prepare type'. Am I missing something?

Quote from RamacheseFTW >>

I'm developing a number of sub-classes to fit the world I'm building. Essentially, it is a much lower magic game than a normal DnD game and classes like sorcerers and wizards don't exist. Instead, spellcasting ability it available through subclasses for fighters, rogues etc, or with hybrids like rangers. 

In developing these subclasses, I'm trying to figure out if there is a way to increase the max level of the spell and the maximum cantrips/spells known. Currently, regardless of whether I select half-level or full-level in the 'spell prepare type' drop down, at 20th level, the sublcasses seem limited to 3 cantrips and 13 spells of no higher than 4th level. I'm not seeing any variation of this regardless of which option I pick for 'spell prepare type'. Am I missing something?

 No. You’re not missing anything. Currently all base class features in the homebrewer are locked behind admin privileges. As users we don’t have that, we only have subclass level privileges. The only subclasses with that feature both use the exact same formula, so that is all we have.

You can increase with specific individual spells (either preselected by you or) selectable by the player as filtered through specifics class/level filters determined by you. What I mean is, you could give them a feature that allows them to pick any one spell from a specific spell list(s) of any level(s) Cantrip-X* at a specific level and have it not count against their number of known spells. 

*“X” presumably Being either 4th for 1/3 casters like Eldritch Knight or Arcane Trickster, or 5th for 1/2 casters like Ranger/Paladin/Artificer. Yes, Artificers are also technically 1/2 casters too, and might be a worthwhile consideration for you as well.

I hope that helps.

Thanks for the quick reply. That is sort of what I thought was the case and I can work around it. As you said, I can always add spells that can be chosen at specific levels as a feature. Not sure if I really need to do this since it is a low-level magic game, but it is an option. Not perfect, but workable. Thanks again.

Happy to help. Just a heads-up, if you give a Monk or Barbarian subclass a feature called “spellcasting” and set the basic MC features for them the same as for The Edritch Knight you can give them 1/3 caster charts too.

this was helpful in making the totem warrior subclass for my barbarian.