That appeared to prompt Justice Merchan, who spoke calmly and soberly, to respond that he had no immediate intention of placing a “gag order” on Mr. Trump, counter to concerns expressed recently by the former president’s legal team. Prosecutors have not requested a gag order.

THE COURT: Certainly, the court would not impose a gag order at this time even if it were requested.

Such restraints are the most serious and least intolerable on First Amendment rights. That does apply doubly to Mr. Trump, because he is a candidate for the presidency of the United States. So, those First Amendment rights are critically important, obviously.

But Justice Merchan, a judge in the State Supreme Court since 2009, did warn the defense to speak to Mr. Trump “and anybody else you need to, and remind them to please refrain from making statements that are likely to incite violence or civil unrest.”

MS. MCCAW: Defendant may not provide the materials he receives through the discovery process to any third party, including the press, and he may not post them to social media.

As Mr. Trump continued to sit in silence, Catherine McCaw, another prosecutor, told the judge that her team was working with Mr. Trump’s lawyers to draft a protective order, a document that would place certain constraints on Mr. Trump.

One of those constraints, she said, would bar the former president from posting certain case material on social media, or from sharing it with reporters. Were Mr. Trump to violate any constraints that are in place, Justice Merchan would decide whether and how to sanction him.

As his arraignment went on, Mr. Trump increasingly fidgeted. He wove and unwove his fingers repeatedly. He crossed and uncrossed his arms. He knocked his knuckles on the hardwood table. Once, he puffed out his cheeks in a sigh.

Finally, more than a half-hour after he entered his plea, he spoke again — after being prompted by his lawyers — but only to respond to Justice Merchan when the judge informed the former president about his right to be present at proceedings — and the ways that right could be forfeited.

THE COURT: If you become disruptive to such a degree that it affects my ability to preside over this case and my ability to ensure that the case is treated the way it needs to be treated for both sides, I do have the authority to remove you from the courtroom and continue in your absence, do you understand that?

DEFENDANT MR. TRUMP: I do.

THE COURT: I expect all other defendants to appear in court, even high-profile defendants.

Given that Mr. Trump was charged with nonviolent crimes, prosecutors were barred from even requesting that he be put in jail. As Justice Merchan prepared to release the former president, Mr. Blanche suggested that Mr. Trump might not appear at his next court date, scheduled for Dec. 4. When asked for his reasoning, Mr. Blanche cited “the incredible expense and effort and security issues” that attended the arraignment.

The judge acknowledged that it had been a huge undertaking for everyone involved. But he noted that December was “quite a ways out.” Finally, he noted that “in the interest of transparency and assuring the rules of law evenhandedly,” he was going to disagree with Mr. Blanche. The implication: As much as possible, the judge intends to treat Mr. Trump like any other defendant.

When the arraignment adjourned around 3:25 p.m., Mr. Trump was the slowest person at the defense table to stand up. He smoothed the lapels of his blue suit jacket, neatened a stack of paper in front of him and walked out of the courtroom.