opinion: Per Curiam.
  Although there were other questions before the Court of Appeals, the sole question presented by this petition is stated as follows:
  “May a United States District Judge orally revoke the probation of a Defendant in open court and in the presence of the Defendant and his counsel and impose a sentence of confinement for a specific period of time and thereafter enter a formal written judgment and commitment in which a larger and longer sentence of confinement is imposed and set forth?”
  It appears that on September 14, 1962, petitioner and his counsel appeared in the District Court, at which time a sentence of confinement of one year was imposed. Subsequently, and in petitioner’s absence, the court enlarged the penalty by one day.
  The propriety of this enlargement of the sentence, along with other questions, was presented on the appeal to the Court of Appeals, which made no mention of it in its opinion. 317 F. 2d 608. The Court of Appeals did, however, deny a motion of the United States to remand the cause for the purpose of correcting the sentence — relief to which the United States concedes petitioner is entitled. See Rakes v. United States, 309 F. 2d 686. The only question is whether the error will be corrected here and now or whether petitioner will be remitted to his remedy under Rule 35 of the Federal Rules of Criminal Procedure ; and whether petitioner will be advantaged by one procedure or another is not our concern.
  This error, in enlarging the sentence in the absence of petitioner, was so plain in light of the requirements of Rule 43 that it should have been dealt with by the Court of Appeals, even though it had not been alleged as error.
  As seen from our Miscellaneous Docket for 1962, the use of collateral proceedings for relief from federal judgments of conviction is considerable:
  October Term, 1962. — Miscellaneous Docket.
  totals.
  Federal prisoners:
  Direct attack. 109
  28 U. S. C. § 2255. 93
  Habeas corpus through federal courts. 38
  Original habeas corpus (in this Court). 40
  Rule 35, Fed. Rules Crim. Proc. 4
  284
  Where state procedural snarls or obstacles preclude an effective state remedy against unconstitutional convictions, federal courts have no other choice but to grant relief in the collateral proceeding. See Fay v. Noia, 372 U. S. 391. But the situation is different in federal proceedings, over which both the Courts of Appeals and this Court (McNabb v. United States, 318 U. S. 332) have broad powers of supervision. It is more appropriate, whenever possible, to correct errors reachable by the appeal rather than remit the parties to a new collateral proceeding.
  We grant certiorari and reverse the judgment denying correction of the sentence.
  Rule 43 of the Federal Rules of Criminal Procedure provides:
  “The defendant shall be present at the arraignment, at every stage of the trial including the impaneling of the jury and the return of the verdict, and at the imposition of sentence, except as otherwise provided by these rules. In prosecutions for offenses not punishable by death, the defendant’s voluntary absence after the trial has been commenced in his presence shall not prevent continuing the trial to and including the return of the verdict. A corporation may appear by counsel for all purposes. In prosecutions for offenses punishable by fine or by imprisonment for not more than one year or both, the court, with the written consent of the defendant, may permit arraignment, plea, trial and imposition of sentence in the defendant’s absence. The defendant’s presence is not required at a reduction of sentence under Rule 35.”
  Supra, note 1.
instruction: What follows is an opinion from the Supreme Court of the United States. Your task is to determine the issue area of the Court's decision. Determine the issue area on the basis of the Court's own statements as to what the case is about. Focus on the subject matter of the controversy rather than its legal basis. In specifying the issue in a legacy case, choose the one that best accords with what today's Court would consider it to be. Choose among the following issue areas: "Criminal Procedure" encompasses the rights of persons accused of crime, except for the due process rights of prisoners. "Civil rights" includes non-First Amendment freedom cases which pertain to classifications based on race (including American Indians), age, indigency, voting, residency, military or handicapped status, gender, and alienage. "First Amendment encompasses the scope of this constitutional provision, but do note that it need not involve the interpretation and application of a provision of the First Amendment. For example, if the case only construe a precedent, or the reviewability of a claim based on the First Amendment, or the scope of an administrative rule or regulation that impacts the exercise of First Amendment freedoms. "Due process" is limited to non-criminal guarantees. "Privacy" concerns libel, comity, abortion, contraceptives, right to die, and Freedom of Information Act and related federal or state statutes or regulations. "Attorneys" includes attorneys' compensation and licenses, along with trhose of governmental officials and employees. "Unions" encompass those issues involving labor union activity. "Economic activity" is largely commercial and business related; it includes tort actions and employee actions vis-a-vis employers. "Judicial power" concerns the exercise of the judiciary's own power. "Federalism" pertains to conflicts and other relationships between the federal government and the states, except for those between the federal and state courts. "Federal taxation" concerns the Internal Revenue Code and related statutes. "Private law" relates to disputes between private persons involving real and personal property, contracts, evidence, civil procedure, torts, wills and trusts, and commercial transactions. Prior to the passage of the Judges' Bill of 1925 much of the Court's cases concerned such issues. Use "Miscellaneous" for legislative veto and executive authority vis-a-vis congress or the states.
choices: Criminal Procedure Civil Rights First Amendment Due Process Privacy Attorneys Unions Economic Activity Judicial Power Federalism Interstate Relations Federal Taxation Miscellaneous Private Action