You can view a PDF with the document pane divided into two panes (Split command) or four panes (Spreadsheet Split command).
With Split view, you can scroll, change the magnification level, or turn to a different page in the active pane without affecting the other pane.
The Spreadsheet Split view is useful if you want to keep column headings and row labels visible while scrolling through a large spreadsheet or table. In this mode, changing the magnification in one pane changes the magnification in all panes. Also, scrolling is coordinated between the panes: scrolling a pane horizontally also scrolls the pane above or below it; scrolling vertically also scrolls the pane to the left or right of that pane.
To split the view into two panes, choose Window > Split, or drag the gray box above the vertical scroll bar.
To split the view into four panes with synchronized scrolling and zoom levels, choose Window > Spreadsheet Split.
In Split view, click a pane to make it active, and change the zoom level for that pane only.
In Spreadsheet Split view, adjust the zoom level to change the displays in all four panes.
In Split view, click a pane to make it active, and scroll to change that pane only.
In Spreadsheet Split view, click a pane, and scroll vertically to change the views in the active pane and the pane beside it. Scroll horizontally to change the views in the active pane and the pane above or below it.