zk/docs/tool-editor.md

Setting your default editor

zk is not a text editor. Instead, it is designed to interface with your favorite editor to write your notes.

You can customize which editor to use either from the configuration file or environment variables. In order of precedence, zk will use:

1. ZK_EDITOR environment variable
2. editor configuration property

   [tool]
   editor = "vim"
   

3. VISUAL environment variable
4. EDITOR environment variable