The key is printed with a triangle, not a microphone, so the docs and the code now call it the triangle key (M9_KEY_TRIANGLE). In an open chat it used to open the thread's options; keypad navigation reaches the conversation header for that now (#623), so the key keeps only its other job, the focused item's hold action. M9_PORT.md no longer calls it unbound. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016yt7fNCKmafm9LtRjyuUmS