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As title. Since no one wants to become a turtle, I want to setup a behavior like M but instead pin the current line to 80% height (0% start from bottom) of the current window, not to center.

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    M doesn’t center lines; it goes to the middle line. Do you perhaps mean zz, zt, etc.?
    – D. Ben Knoble
    May 27, 2022 at 14:20

2 Answers 2

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:h H accepts a count, so you can do something like this:

exe "normal " .. winheight(0) * 80 / 100 .. "H"

which translates to XH where X is a number.

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Update

Since I don't like scrolloff, I update to this new version:

vim.api.nvim_set_keymap('n', 'M', '<cmd>lua pin_to_80_percent_height()<CR>', NOREF_NOERR_TRUNC)
function _G.pin_to_80_percent_height()
  vim.opt.scrolloff = 5
  vim.cmd("exe 'normal! zt'")
  vim.opt.scrolloff = 0
end


old answer

  1. Set scrolloff to 5

    vim.opt.scrolloff = 5
    
  2. Set keymap M to zt.

    vim.api.nvim_set_keymap('n', 'M', 'zt', NOREF_NOERR_TRUNC)
    

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