A Step by step guide:-1. Download & Install
PDF Imposition DE:
//www.traction-software.co.uk/downloads/PDFImpositionDEInstall.exe
2. Run PDF Imposition DE
Set the input file as the 2up file to convert back to 1up.
Set the output file as the 1up filename output.
3. Select 1up vertical split
setting
Select Processing type "1up Split on Vertical"
Then select "Re-order based on outer-in source" checkbox.

4. Process
Click "Impose' button in the main PDF Imposition DE window to
impose the file and then click 'View' button along side the output
filename to check it's come out right.
Having difficulty or need a different re-order output?
please email us:
support@traction-software.co.uk