A warning is reported when a setting in the order form conflicts with a setting of the document. It is recommended that you solve the warning(s) before you submit the order.
NOTE
The overview of warnings appears in Step 3 (of the wizard) only for products of type document with binding and flyer.
You can have the following warnings:
Pages in the attachment(s) do not fit in the given order's media
The front/back cover does not fit in the given order's cover media
The orientation of the attachments does not match the orientation in the order's ticket
There are landscape and portrait orientations in the attachments
You will also get warnings regarding the preview not being completely accurate if the used media is prepunched, transparent, preprinted, has tabs etc.
The link Overview of warnings is available in the left-hand pane of the dialogue where you can configure the delivery settings.