This summary is not the rule. The rule text controls.
When a criminal trial goes to the jury, the judge has to give the jury written verdict forms to use. There needs to be a form for each crime the person is charged with. If the evidence supports it, the judge also has to give forms for any lesser crimes that are automatically part of the bigger charge (for example, if someone is charged with a serious assault, a lesser form of assault might also need its own form).
This makes sure the jury has the right paperwork to record their decision on every possible charge that fits the case. It also means jurors are not stuck choosing only between guilty on the top charge or not guilty at all. They can convict on a lesser charge if that fits the evidence better.
If a verdict form has a small mistake or is filled out incorrectly, the judge can fix it. This has to happen in open court, with both sides and the jury present. The judge can only fix simple form issues, not change the actual decision the jury made.