Inline Edit (Cmd/Ctrl+K)

Inline Edit works on the code you have selected. Select a function or a few lines, press Cmd+K (Mac) or Ctrl+K (Windows/Linux), type what you want ("convert to async/await", "add input validation and a docstring") and submit. Cursor shows the change as a diff right in the editor: removed lines in red, added lines in green. Accept it, reject it, or type a follow-up instruction to refine it.

Two related moves:

• Quick question: after opening inline edit on a selection, switch to question mode with Opt+Enter (Mac) or Alt+Enter (Windows/Linux) and ask "why does this loop skip the last item?". If you like the suggested fix, reply "do it" to apply it.
• Send to Agent: if the change grows beyond the selection (other files, tests to run), select the code and press Cmd+L / Ctrl+L to open Agent with that selection attached as context.

Choosing between the three features:

• Tab: you are already typing the change.
• Inline Edit: one place, clear instruction, you want to see the diff immediately.
• Agent: several files, needs searching, or should run commands.

Inline Edit sees mainly your selection and nearby code, so name what matters: "use our Result type from errors.ts" works better than "handle errors properly". Keep selections focused; selecting a whole 2,000-line file gives the model too much to change at once and makes review harder.