G'day. It'd be real nice to have the little "cross" style markers that Show Tile Grid Lite has -- basically, a small cross placed at each corner of the chunk, rather than a full outline of it. Thank you!

Seems like a reasonable request. The spacing option is partially overlapping in how it uses some API features, but I think I know how to solve it. It should be doable still.
I thought I had already implemented this a while ago. But then going through the options I see that it is a missing feature.

Edit: Maybe spacing and cross markers shouldn't be possible to use together even if it is technically possible. Might just look confusing if both are used at once. Maybe users get to choose one or the other but not both at the same time for the same grid?

Done. Negative spacing to set size of cross. I'm Qonsidering making some easier to find separate setting for this feature later, but should be testable now. Tell me what you think.

Thank you very much. I'll try it out soon. :)