About your solution to play "portamento", I tried it, and I can see how Vienna Ensemble changes correctly the sound of violin to play portamento technique, but notes sound very short, and no portamento is listened. Why?
EDIT: Solved! I had a problem with the Metronome, it was assigned to the same channel as violin, and "short notes" that I listened were from metronome "clicks", not from violin.
About your solution to play "mute" sounds, I see in Sibelius exists alredy the text "mute" with the command "+mute". But I think the problem is that Vienna Ensemble uses two different instruments for Trumpet and Trumpet Mute, not the same instrument with diferent techniques or keyswitches.
EDIT: Problem solved! Thanks!
Another question, but this time about this forum. I write different paragraphs pressing the return key, but they don't appear when I publish my comment, all lines appear in the same paragraph.
EDIT: Solved too. In this site go to: Community, Profile, Community and select "Standard" or "Enhanced" on Content Editor. Although I need to create the text into TextEdit or NotePad, and then copy here as Word Text.