How do I rotate a page?

To rotate a page in a document, use the DocumentOperation API. For example, if you want to rotate the first page of your document 90 degrees clockwise, use the following code:

// Rotate the first page of the document 90 degrees clockwise.
instance.applyOperations([
  {
    type: "rotatePages",
    pageIndexes: [0],
    rotateBy: 90
  }
]);