How to open split relative to a specific buffer?

[ByteDrummer]

Right now when I use the key mappings to open a split or vsplit, the new buffer is always split relative to the leftmost buffer. Is it possible to open the split relative to a specific buffer using the same select prompt used when opening a file? If not, are there any other solutions?

[weirongxu]

Currently, there is no such function and plan, but we can collect related requirements first, and then implement more flexible features in the future