Acrobat document resizing

When you execute it in the console, you have to select all of it and press command+return.

  pageCnt = this.numPages;

  // calc target dim in pt

  var targetPageWidth = nSiX * 72 / 25.4;

  var targetPageHeight = nSiY * 72 / 25.4;

  t.duration = pageCnt;

  t.begin();

  for (var i = 0; i < pageCnt; i++ ){

  t.value = i;

  t.text = "Зміна розміру сторінки " + (i + 1);

  // для MediaBox

  var oRect = this.getPageBox("Media", i);// get old value of MediaBox

  // розрахувати різницю

  var mediaBox_dX = (targetPageWidth - oRect[2] - oRect[0]) / 2;

  var mediaBox_dY = (targetPageHeight - oRect[1] - oRect[3]) /2;

  // set new dimentions

  this.setPageBoxes({

  cBox: "Media",

  nStart: i,

  rBox:[

  oRect[0] - mediaBox_dX,

  oRect[1] + mediaBox_dY,

  oRect[2] + mediaBox_dX,

  oRect[3] - mediaBox_dY,

  ]

  });

  // для CropBox

  var oRect = this.getPageBox("Crop", i);// get old value of CropBox

  var dX = (targetPageWidth - oRect[2] - oRect[0]) / 2;

  var dY = (targetPageHeight - oRect[1] - oRect[3]) /2;

  // set new dimentions

  this.setPageBoxes({

  cBox: "Crop",

  nStart: i,

  rBox:[

  oRect[0] - dX,

  oRect[1] + dY,

  oRect[2] + dX,

  oRect[3] - dY,

  ]

  });

  // для TrimBox

  var oRect = this.getPageBox("Trim", i);// get old value of TrimBox

  this.setPageBoxes({

  cBox: "Trim",

  nStart: i,

  rBox:[

  oRect[0] + mediaBox_dX,

  oRect[1] + mediaBox_dY,

  oRect[2] + mediaBox_dX,

  oRect[3] + mediaBox_dY,

  ]

  });

  // для BleedBox

  var oRect = this.getPageBox("Bleed", i);// get old value of BleedBox

  this.setPageBoxes({

  cBox: "Bleed",

  nStart: i,

  rBox:[

  oRect[0] + mediaBox_dX,

  oRect[1] + mediaBox_dY,

  oRect[2] + mediaBox_dX,

  oRect[3] + mediaBox_dY,

  ]

  });

  // для ArtBox

  var oRect = this.getPageBox("Art", i);// get old value of ArtBox

  this.setPageBoxes({

  cBox: "Art",

  nStart: i,

  rBox:[

  oRect[0] + mediaBox_dX,

  oRect[1] + mediaBox_dY,

  oRect[2] + mediaBox_dX,

  oRect[3] + mediaBox_dY,

  ]

  });

  }

  t.end();

With JavaScript you'd use the setPagesBoxes method to first set the media box to the size you want and then set the crop box to match.