What are the main operating modes in VIM and how do you switch between them?

Four modes — Normal (commands), Insert (i to type), Visual (v to select), Command (: for :w/:q) — and Esc always returns to Normal.

* Vim's mode transitions — Normal is the hub, with Insert, Visual and Command-line reached from it (Esc always returns to Normal). — Harp, CC BY-SA 4.0, via Wikimedia Commons. *

Mode switching diagram:

Normal ←──Esc──→ Insert (i)
   ↓
   : ←──Esc/Enter
   ↓
Command Mode

Normal ←──Esc──→ Visual (v, V, Ctrl+v)

Key commands by mode:

• Normal: i (insert), : (command), v (visual), p (paste), y (yank), d (delete)
• Command: :q (quit), :w (write), :q! (force quit), :help, :e (new file)
• Visual: v (characters), Shift+V (lines), Ctrl+v (blocks)

The golden rule: when lost or stuck, hit Esc to get back to Normal mode — every command flows from there. Almost every vim "I'm trapped" moment is solved by Esc followed by :q!.

Go deeper:

• Vim help: intro.txt — modes (vimhelp.org) — the official mode list and the Normal/Insert/Visual/Command transition table.