Thank you for the response.
I had actually played around with that button before and had not seen how to do that. You have animation length with some Total number of Frames pre-entered there & below this Select time Unit, ... Time or Frame.
That is confusing.
Since in the free version I used before I did not adjust anything here & the animated character read out all the presented text, however long. In the recently acquired Pro version, somehow, whether I edited an existing animation with much longer text & added the new text, this time about 5.5 minutes or started a new animation, with this text, it only read about 26 or so secs and ignored the rest.
Anyway, after your suggestion, I am manually increasing under Animation Length, the total number of Frames by trial & error to, 7000, 8000, 9000, 9500, ... until I will shortly come to the point the animation speaks out all text.
As said in previous version this was not necessary, but at least this is helping.
Which version are using in the meantime if I may ask?