Registration marks help printers to align pages correctly; crop marks show where pages should be cut.
To add print marks
Select File > Imposition or click the button on the Advanced toolbar.
Click the Options tab.
Select Crop Marks to add crop marks to the imposition file, and select:
Inner Marks: Add crop marks to the blank space next to the spine.
Crop Marks Style: Choose single or double.
Check Registration Marks to add these to the file and select a style.
Check Description to have notes added (such as Fold: 1, Sheet: 1), to the medium margin when printed.
To specify the sequence for double-sided printing
Select an option:
Interleave document: First print the front sides of a medium, then print the back of that medium before continuing to the next medium.
Fronts first, then backs: Print the front sides of all media and then print their backs in the same order.
Fronts first, then backs reverse: Print the front sides of all media and then print their backs in reverse order.
Choose Flip backs of sheets to rotate the media 180 degrees before printing the back.