where FunctionCode is the characteristic you want to change, and Value is the value you want to change it to
PI.DMORIENTATION = 0
DMORIENT.PORTRAIT = 1
DMORIENT.LANDSCAPE = 2
PI.DMPAPERSIZE = 1
DMPAPER.LETTER = 1 ! Letter 8 1/2 x 11 in
DMPAPER.LETTERSMALL = 2 ! Letter Small 8 1/2 x 11 in
DMPAPER.TABLOID = 3 ! Tabloid 11 x 17 in
DMPAPER.LEDGER = 4 ! Ledger 17 x 11 in
DMPAPER.LEGAL = 5 ! Legal 8 1/2 x 14 in
DMPAPER.STATEMENT = 6 ! Statement 5 1/2 x 8 1/2 in
DMPAPER.EXECUTIVE = 7 ! Executive 7 1/4 x 10 1/2 in
DMPAPER.A3 = 8 ! A3 297 x 420 mm
DMPAPER.A4 = 9 ! A4 210 x 297 mm
DMPAPER.A4SMALL = 10 ! A4 Small 210 x 297 mm
DMPAPER.A5 = 11 ! A5 148 x 210 mm
DMPAPER.B4 = 12 ! B4 (JIS) 250 x 354
DMPAPER.B5 = 13 ! B5 (JIS) 182 x 257 mm
DMPAPER.FOLIO = 14 ! Folio 8 1/2 x 13 in
DMPAPER.QUARTO = 15 ! Quarto 215 x 275 mm
DMPAPER.10X14 = 16 ! 10x14 in
DMPAPER.11X17 = 17 ! 11x17 in
DMPAPER.NOTE = 18 ! Note 8 1/2 x 11 in
DMPAPER.ENV.9 = 19 ! Envelope #9 3 7/8 x 8 7/8
DMPAPER.ENV.10 = 20 ! Envelope #10 4 1/8 x 9 1/2
DMPAPER.ENV.11 = 21 ! Envelope #11 4 1/2 x 10 3/8
DMPAPER.ENV.12 = 22 ! Envelope #12 4 \276 x 11
DMPAPER.ENV.14 = 23 ! Envelope #14 5 x 11 1/2
DMPAPER.CSHEET = 24 ! C size sheet
DMPAPER.DSHEET = 25 ! D size sheet
DMPAPER.ESHEET = 26 ! E size sheet
DMPAPER.ENV.DL = 27 ! Envelope DL 110 x 220mm
DMPAPER.ENV.C5 = 28 ! Envelope C5 162 x 229 mm
DMPAPER.ENV.C3 = 29 ! Envelope C3 324 x 458 mm
DMPAPER.ENV.C4 = 30 ! Envelope C4 229 x 324 mm
DMPAPER.ENV.C6 = 31 ! Envelope C6 114 x 162 mm
DMPAPER.ENV.C65 = 32 ! Envelope C65 114 x 229 mm
DMPAPER.ENV.B4 = 33 ! Envelope B4 250 x 353 mm
DMPAPER.ENV.B5 = 34 ! Envelope B5 176 x 250 mm
DMPAPER.ENV.B6 = 35 ! Envelope B6 176 x 125 mm
DMPAPER.ENV.ITALY = 36 ! Envelope 110 x 230 mm
DMPAPER.ENV.MONARCH = 37 ! Envelope Monarch 3.875 x 7.5 in
DMPAPER.ENV.PERSONAL = 38 ! 6 3/4 Envelope 3 5/8 x 6 1/2 in
DMPAPER.FANFOLD.US = 39 ! US Std Fanfold 14 7/8 x 11 in
DMPAPER.FANFOLD.STD.GERMAN = 40 ! German Std Fanfold 8 1/2 x 12 in
DMPAPER.FANFOLD.LGL.GERMAN = 41 ! German Legal Fanfold 8 1/2 x 13 in
DMPAPER.ISO.B4 = 42 ! B4 (ISO) 250 x 353 mm
DMPAPER.JAPANESE.POSTCARD = 43 ! Japanese Postcard 100 x 148 mm
DMPAPER.9X11 = 44 ! 9 x 11 in
DMPAPER.10X11 = 45 ! 10 x 11 in
DMPAPER.15X11 = 46 ! 15 x 11 in
DMPAPER.ENV.INVITE = 47 ! Envelope Invite 220 x 220 mm
DMPAPER.RESERVED.48 = 48 ! RESERVED--DO NOT USE
DMPAPER.RESERVED.49 = 49 ! RESERVED--DO NOT USE
DMPAPER.LETTER.EXTRA = 50 ! Letter Extra 9 \275 x 12 in
DMPAPER.LEGAL.EXTRA = 51 ! Legal Extra 9 \275 x 15 in
DMPAPER.TABLOID.EXTRA = 52 ! Tabloid Extra 11.69 x 18 in
DMPAPER.A4.EXTRA = 53 ! A4 Extra 9.27 x 12.69 in
DMPAPER.LETTER.TRANSVERSE = 54 ! Letter Transverse 8 \275 x 11 in
DMPAPER.A4.TRANSVERSE = 55 ! A4 Transverse 210 x 297 mm
DMPAPER.LETTER.EXTRA.TRANSVERSE = 56 ! Letter Extra Transverse 9\275 x 12 in
DMPAPER.A.PLUS = 57 ! SuperA/SuperA/A4 227 x 356 mm
DMPAPER.B.PLUS = 58 ! SuperB/SuperB/A3 305 x 487 mm
DMPAPER.LETTER.PLUS = 59 ! Letter Plus 8.5 x 12.69 in
DMPAPER.A4.PLUS = 60 ! A4 Plus 210 x 330 mm
DMPAPER.A5.TRANSVERSE = 61 ! A5 Transverse 148 x 210 mm
DMPAPER.B5.TRANSVERSE = 62 ! B5 (JIS) Transverse 182 x 257 mm
DMPAPER.A3.EXTRA = 63 ! A3 Extra 322 x 445 mm
DMPAPER.A5.EXTRA = 64 ! A5 Extra 174 x 235 mm
DMPAPER.B5.EXTRA = 65 ! B5 (ISO) Extra 201 x 276 mm
DMPAPER.A2 = 66 ! A2 420 x 594 mm
DMPAPER.A3.TRANSVERSE = 67 ! A3 Transverse 297 x 420 mm
DMPAPER.A3.EXTRA.TRANSVERSE = 68 ! A3 Extra Transverse 322 x 445 mm
PI.DMPAPERLENGTH = 2
PI.DMPAPERWIDTH = 3
PI.DMSCALE = 4
PI.DMPRINTQUALITY = 5
DMRES.DRAFT = 65535 ! -1
DMRES.LOW = 65534 ! -2
DMRES.MEDIUM = 65533 ! -3
DMRES.HIGH = 65532 ! -4
PI.DMCOLOR = 6
DMCOLOR.MONOCHROME = 1
DMCOLOR.COLOR = 2
PI.DMCOLLATE = 7
DMCOLLATE.FALSE = 0
DMCOLLATE.TRUE = 1
PI.DMDEFAULTSOURCE = 8
DMBIN.UPPER = 1
DMBIN.ONLYONE = 1
DMBIN.LOWER = 2
DMBIN.MIDDLE = 3
DMBIN.MANUAL = 4
DMBIN.ENVELOPE = 5
DMBIN.ENVMANUAL = 6
DMBIN.AUTO = 7
DMBIN.TRACTOR = 8
DMBIN.SMALLFMT = 9
DMBIN.LARGEFMT = 10
DMBIN.LARGECAPACITY = 11
DMBIN.CASSETTE = 14
DMBIN.FORMSOURCE = 15