Jeffery Warren Sanders, Texas prisoner # 680206, appeals the dismissal as frivolous of his pro se, in forma pauperis complaint. Sanders has not repeated on appeal his assertions that he was denied Saturday mail and a newspaper subscription while in the Galveston County Jail or that his habeas claims were not properly raised in a 42 U.S.C. § 1983 action, and these issues are abandoned. Brinkmann v. Dallas County Deputy Sheriff Abner, 813 F.2d 744, 748 (5th Cir. 1987). His assertion that Donna Kliger tampered with and misplaced legal documents is a theory raised for the first time on appeal and is not reviewed by this court. Leverette v. Louisville Ladder Co., 183 F.3d 339, 342 (5th Cir. 1999).

Sanders’s assertions that Kliger opened his legal mail outside of his presence are insufficient to establish a claim of denial of access to the courts. Brewer v. Wilkinson, 3 F.3d 816, 826 (5th Cir. 1993). Likewise, Sanders has not alleged a denial of access to the courts as a result of the inadequacies in the Galveston County Jail law library because he did not allege that his position as a litigant was prejudiced. Lewis v. Casey, 518 U.S. 343, 350-53, 116 S.Ct. 2174, 135 L.Ed.2d 606 (1996). The district court did not abuse its discretion in dismissing these claims as frivolous. See Siglar v. Hightower, 112 F.3d 191, 193 (5th Cir. 1997).

Sanders also asserts that jail employees refused to correct jail classification records showing that Sanders had received time served for several bad-check charges, when in fact the charges had been dismissed. The district court did not abuse its discretion in dismissing his civil rights challenges to these actions as barred by Heck v. Humphrey, 512 U.S. 477, 114 S.Ct. 2364, 129 L.Ed.2d 383 (1994). His allegations implicate the invalidity of his parole revocation, and Sanders has not demonstrated that his revocation has been invalidated. Heck, 512 U.S. at 487, 114 S.Ct. 2364; Littles v. Bd. of Pardons and Paroles Div., 68 F.3d 122, 123 (5th Cir. 1995). The judgment of the district court is therefore AFFIRMED.

Sanders has moved for correction and modification of the record on appeal and for appointment of counsel. These motions are DENIED.

AFFIRMED; MOTIONS DENIED.