Question about Cyrus

[locker]

So i brought him a Green Dresser from the green set and an Emerald,but he didn't offer to change it to that color.
Also how do i hang a painting on a museum piece,i have tried displaying it on it in my room by pressing (A) but nothing happened so i took it to Cyrus and all he could do is change it black

 

[TeddysMama711]

When you bring him both he should say something like "I see you have an ore, should we change it to that?"

Not sure about the museum piece though, sorry.

 

[locker]

he doesn't say i see you have an ore and i had ore in my bag

 

[Sour of Abnaxus]

Also how do i hang a painting on a museum piece,i have tried displaying it on it in my room by pressing (A) but nothing happened so i took it to Cyrus and all he could do is change it black

If you're talking about the tall display case/poster stand, as far as I know, you can only get him to change the artwork to whatever he's offering or clothing or patterns. If there is no art in your display case, its function is the same as any table.