You can zoom in/out puzzles of 140/280/630 pieces the following way:

1. Tap the "MENU" button at the bottom right or left corner.

2. Tap "ZOOM."

Zoom feature automatically divide puzzles of 140/280 pieces into 4 parts.

Puzzles with 360 pieces are divided into 4 or 9 parts. 

You will be automatically moved to the next part as soon as you finish the previous one.

❗ Please, note that puzzles of 140/280/630 pieces are zoomed in by default, and you can zoom them out using the instructions above.