Thanks Philippe Riondel for the feedback.

Indeed, I'm talking about segments separated by a carriage return (it's a single sentence but a carriage return is used so that the sentence fits into a text box in the power point).

I have no problem merging 2 segments, even with a carriage return in Studio 2017, but I have been told by the support that only 2 segments can be merged. Hence, the enhancement request.

According to my experience, you already can do it. The only condition is that those segment have to be in the same paragraph. You can merge more than 2 segments even if they are separated by a full stop (which is the basic segment parsing criteria), but not if there is a carriage return (the end of a paragraph, which can be inadvertently inserted – mainly in PDF documents) in between, because, unlike a full stop, a carriage return relates to the actual structure of the document, and Studio is not intended to change that.