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Sometimes a conversation is much easier than any documentation can be. We always appreciate receiving feedback and if you have questions about using pdfToolbox in your environment, we encourage you to get in contact.

Technical questions or comments

To ask a technical question or problem, you can use the "Report a problem" form on the callas software website.


  1. Go to the callas software web site at
  2. Hover over the "Support" item in the menu.
  3. Click on the "Report a problem" item in the "Support" menu.

Alternatively, you can also send email to "". When sending support files that are over 2MB, it is more reliable and quicker to send them to us through our Dropbox.

Please provide as many details as possible when you contact us, so that we can help you as quickly and efficiently as possible.

Other questions or comments

For all other questions or comments about pdfToolbox or any of the other callas software products, please write and we will help you as quickly as possible.


Antonio Aristóteles Bastos

I got Callas from QuarkXpress. I do not use imposing, I developed a system to print large formats on loose leafs. But I just had a special order and I need to print a book in a tabloid format: 320 x 330mm on a 320 x 660 mm paper folded in half. Is it possible to do it with Callas?
I tried a while but some problems emerged: only 4 pages (from 16) were imported; as I try to set the format for 320 x 660, prevíews of the pages disappear… and I just can't go any far.
Imposition software for "large formats", anything over 500x500mm, are very expensive and I do not expect to use this on a regular basis and they are not cheap.
Can you sort this out?

Author callas software

Hello Aristóteles,
the impose engine is quite flexible regarind sizes of sheets, so imposing such a book should not be a problem. Have you tried the "Booklet" functionality? This Switchboard Action should to the job.
I transferred your request to our internal ticket system (you should already received a confirmation by eMail). A colleague will contact you shortly to assist you.
Best regards,

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