This is just a little thing but down in the lower right where you choose the type of tab, sparql, trig, turtle, graphql, etc I have no idea what SRS is. Stardog Reasoning Service? I don't recall ever having seen SRS in the docs. It seems like a combination of stuff including ICV.
That menu is all together a little confusing. What's JSON? Is it JSON-LD? and what is TXT. JSON and TXT doen't have any options and I'm a little confused about what exactly you'd do with them other than maybe using TXT to hold some notes in Studio.
There seem to be two groups of options down there querying (sparql, graphql) and file editing (trig, turtle, shacl, etc)
Having an "add constraints' button on the editing pages seems a little strange because I can't ever imagine writing some turtle and then thinking, "humm...I think I'd like to make this a constraint". I think I'd be much more likely to open something as a constraint and then choose the syntax that I'd like to write it in.
Hope that's helpful.