Episode IV: A New Hope
* The lines "Episode IV: A NEW HOPE" were added to the opening title crawl upon its 1981 re-release, one year after "Episode V: THE EMPIRE STRIKES BACK" was released with its full title. The new opening crawl also capitalized the word 'Rebel' in 'rebel spies', which was not capitalized in the original 1977 opening crawl. This altered the formatting of the text to accommodate the two additional lines, and slightly changed the timing so the crawl no longer appears at the same music cue. (This last change had been present on EMPIRE's initial release, and would remain on all four subsequent films as well.)
* The film was initially released in 70mm 6-track audio (in today's terms, a 4.2 track as opposed to a 5.1 track). The wider 35mm release had a 2-track Dolby Stereo matrixed 4-channel optical soundtrack. A mono mix was produced later for exhibition in cinemas with no Dolby Stereo support, which contains some changes from the stereo version.
* Alternate takes of some of C-3PO's dialogue are used in the mono sound version.
* The line "close the blast doors!" was added to the mono release. This line was also included in the 1997 special edition and 2004 DVD version.
* C-3PO's tractor beam line was added to the mono version. This line was also included in the 1997 special edition and 2004 DVD version.
* After Luke hands Leia his blaster in the chasm swing sequence, it sounds like Dirty Harry's .44 Magnum when she fires it. This is present in the mono mix and the 1997 Special Edition, but was changed back to a standard blaster sound in the 2004 DVD.
* The line "Blast it, Biggs, where are you?" from the original stereo version was changed to "Blast it, Wedge, where are you?" for the mono sound releases. The mono mix is the only occurrence of this change.
* Beru Lars is voiced by a different actress (or possibly different takes by the same actress) in the mono version.
* Ben Burtt supervised remastering of the sound mix for the 1985 VHS/Laserdisc release, which contains C-3PO's tractor beam line. Aside from this line, better dynamic range, and a slightly wider stereo image, this version is almost the same as the 1977 stereo mix.
* Another remix was produced for the 1993 Definitive Collection Laserdisc, which was also used for the 1995 "Faces" VHS/Laserdisc release and the 2006 Limited Edition DVD release. This mix was a matrixed stereo version of the 1977 70mm 6-track mix, with brand-new sound effects added, such as glass shattering when Han and Luke shoot the cameras in the detention block. C-3PO's tractor beam line is, again, not present in this mix.
* The color timing in the 1993 Definitive Collection Laserdisc version was altered slightly in the scene with R2-D2 in the canyon before he is captured by the Jawas. This same transfer was also used in 1995 for the "Faces" set. The original version of the scene takes place in daylight, while the color in the 1993 version is adjusted to make it appear more like twilight. This was further changed in the 1997 Special Edition, when the image was darkened and the sky altered from blue to an orange sunset.