Mapped Ctrl+Shift+E in Neovim (WSL + Windows Terminal)

The Problem

I wanted to toggle NvimTree using Ctrl+Shift+E in Neovim (running inside WSL, through Windows Terminal).

It works in VSCode by default, but in Neovim, <C-S-e> didn't do anything.

What I Tried

1. Ran cat, pressed Ctrl+Shift+E → it outputs ^[[1;6E
2. Ran :echo getcharstr() in Neovim → got nothing.
   → Neovim drops unknown escape sequences from terminal.
3. Realized Ctrl+Shift+E isn't supported in terminfo/libtermkey.
   → Neovim never receives it.

The Hack

Added this keybinding in Windows Terminal settings.json:

{
  "command": { "action": "sendInput", "input": "§" },
  "keys": "ctrl+shift+e"
}

Then in Neovim:

vim.keymap.set("n", "§", "<cmd>NvimTreeToggle<CR>")

👉 Works! I can now toggle the file tree with Ctrl+Shift+E.

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Note: I haven’t fully verified this behaviour in every environment, but in many terminal setups Neovim fails to recognise certain modified keys (e.g., Ctrl+Shift+E) because the escape sequence sent by the terminal isn’t defined in terminfo/libtermkey.