Good to know. You can customize shortcuts by going to prefs>keys. Click the + to add a new key mapping. Press the shortcut you want. For Action choose "Select M

Good to know. You can customize shortcuts by going to prefs>keys. Click the + to add a new key mapping. Press the shortcut you want. For Action choose "Select Menu Item…" and then find the item you're looking for in the popup menu that appears (Edit>Open Autocomplete…, in your case).