How to change document's page size?
To change your document's page size, please follow the steps below:
- Open the document which you want to change the page size.

- Tap on the "Properties" button in the bottom toolbar.

- Select the the document size from the options under "Page Size."

- You can also manually adjust the image aspect ration by using "Customs."

- Finish your adjustments and press "Done" to save your document.