Requested behavior:

Support In-Context Preview for XLIFF files in Phrase TMS similarly as the In-Context editor for Ruby in Phrase Strings.

Current behavior:

At the moment, only other formats like AsciiDoc, .DITA, Google Docs, Sheets and Slides, .HTML, .IDML, Markdown, Microsoft Excel (including multilingual files), Microsoft PowerPoint, Microsoft Word, .RTF and .XML with style sheets (including multilingual files) are supported.

Use case:

In-Context Preview is helpful for having better overview over the target format when translating the content.