3 is possible in engrave mode with built in functionality
2 and 4 you can fake using the line tool or playing techniques possibly, if you hide the stem and beam and add your own.
5 in the treble clef I think is actually possible. In the bass clef it should be possible if you use hidden tuplets and create fake beams using the line tool.
6 is possible in engrave mode with built in functionality
7 - you can create a fanned accel or rit beam with the built in tools. If you need to do any weird beaming like you show there, you will need to do a fake beam with the line tool.
8. I believe you can do this if you use different voices and hide the rests, then beam across rests
benwiggy - I’m not sure why the OP wants to do most of those things shown - most of them seem rather strange, and I have no idea what they mean, and I have looked at quite a bit of contemporary music. I have a feeling he or she is just picking some crazy outlandish things they can do somewhat easily in Finale and wanting to make absolutely sure that Dorico can do all of those weird things too.
This sort of thing gets right to the heart of the difference between Finale and Dorico.
If you want to do all sorts of random (sometimes absurd) notation, Finale lets you do it. And if you want the score to look amateurish and clunky, Finale will cheerfully acquiesce. Sometimes it’s what you need, I guess.
I think the OP was looking to find some direct equivalent for every tool in Finale’s “Special Tools” palette in Dorico, but that just isn’t realistic because it is a different program. On the flip side, Dorico obviously has a bunch of tools that Finale does not have that make certain operations a lot easier. Many of Finale’s Special Tools are not really needed in Dorico because it has other, better ways of accomplishing the same thing, often doing it correctly automatically. However, with the line tool in Dorico 3.5, it is notable that every single one of the weird notation cases in the above example can be reproduced in Dorico 3.5 by using certain workarounds, and the more straightforward ones require no workaround.