How to scale two pages of pdf into one page?

1. At this time, these two pictures are on two different pages.

2. Then click the document and select Imposition to open the Imposition dialog box.

3. Click the layout and select the series in the type drop-down box. Enter 2 for the column and 1 for the row.

4. Click "Paper", select "Suitable for Paper Size", find the desired paper type (if there is no desired paper type, you can also add a custom paper type here), and click "OK".

At this time, you can see two pictures appear on the same page.