Getting vim to show the lines relative to other screen in splitscreen?

Question

I am splitting one document vertically in vim using :vsp.

Each side displays the relativenumber relative to the last cursor position at that side.

I want to move a line from the left side to the right side using the relative number of lines. Say: :m-33.

How could I get the relativenumber on the right side to count relative to the cursor position on the left side?

P.S.

(I'm using NeoVim)

I could not find any such option in the :help

Also, vim would need to know that both sides are the same file, so it is reasonable that it has no such feature.

Answer 1

Cursor position is local to the window so there is always only one current line, which means that there is no native way to do exactly what you want.

But nothing is stopping you from dropping a mark on the left side:

ma

then switching to the right side:

<C-w>w

then moving the current line to below that mark:

:m'a