Print preview as source + Print Preview as Target disabled.

Question

Hi, can you please help me? 
 I use Studio 2017 and in /File > Print & View > View in/ 
 Print preview as source + Print Preview as Target are disabled. Only Print preview as side-by side is enabled. How can I enable them all? Thanks for your help! 
 Patrizia

Daniel Hug · Accepted Answer

Patrizia Cipolla 
 This is technically impossible with an xlf file. No CAT tool can do this. 
 Reason is: There is no "document" in the sense of anything printable. This is how an xlf file looks like: 
 
 Xlf (XML Localization Interchange File Format) is a format for localization. The target text is re-inserted into the layout (whatever there was) in a later step, but the xlf file does not contain the information required to do that. 
 Daniel

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Print preview as source + Print Preview as Target disabled.