Documentation doesn't say too much about key sequences so I tried it out.
Key "Z" in LogicPro is for zoom. This I want to get:
But right now this sequence is deleting whatever is there. 
It deletes if you tell BTT to delete.
Okay, I read the tiny text below, that 2x backspace is activated. Learned. Thank you Frank Dankeschön 
Additional question:
It works, but still the each key command goes separately through.
Z + 1 should recall "Zoom 1" (by firing key command 5, assigned in LogicPro)
Z already is "Zoom the region"
1 already is "close plugin windows"
Logic now does
Maybe all these tiny elements on the bottom become handy now, but I tried them with no success. See picture of beginning post.
I do not know LogicPro. But could this have something to do with text fields and non-text fields?
Guten Morgen!
It could be any other App receiving Shortcuts.
Maybe I am wrong, but I thought this feature was made for this? @Andreas_Hegenberg
I think this is a real benefit for my workflows, as I can sum up many shortcuts in a logical way:
Z will always be for shortcuts regarding Zoom
A will be always be for shortcuts regarding Automation
Right now, all those shortcuts are kind a logical sorted on my keyboard. But with 3000 shortcuts you run into problems 
Key Sequences in general don't override the default behavior of keys. This means if the app has internal shortcuts for Z and for 1 they will always also be executed.
There are ways to workaround that, e.g. by defining some key sequence that starts the predefined action "Start Blocking Keyboard Input"
Maybe post a few screenshots of what you tried to setup, it's a bit hard to understand for me right now
Apologize Andreas. I find it hard to describe in english. 
Pic1: Z ist already in use.
Pic2: Recall Zoom 1-3 is triggered by keys 5-7.
This isn't intuitive! But 1-3 is used for other stuff. I thought, with your trigger I could make this work:
I press Z and within 1-2 sek I press 1 or 2 or 3. What I get is Recall Zoom 1, 2 or 3.
No triggering of other shortcuts.
The problem is that key sequences do not block events by default. Thus if you press z, that key will always reach LogicPro first - and because of that will trigger the associated action in LogicPro.
Same for the 1,2 or 3 key.
This is hard to solve, you could disable/change the shortcuts in LogicPro and trigger the functions from equivalent key sequences, but I doubt this is what you want.
So you want to press «z» and then «1» to trigger some zoom function.
I'm not on my computer right now, but I think this is possible, but it's a bit fiddly to set up.
Change the shortcuts in LogicPro, for example:
«z» = ctrl+shift+z
«1» = ctrl+shift+1
Then set up in BTT:
«z» Short press, up = «z» (the letter)
«z» Long press, down = ctrl+shift+z plus âblock Keyboardâ
«z» Long press, up = Reactivate keyboard
Thereafter
â1â = ctrl+shift+1, Advanced Condition: only if the keyboard is blocked
If you now press and hold «z» and press «1», you have your sequence z1
At least I think so
Oh, this makes me feel sad now. That was just a too short gamechanger moment with BTT.
True, Frank, thanks for pointing out. But changing ca. 30-60 key commands isn't what I am after 
I wish there would be another possibility as it is amazing to just memorize the first letter of an action (or a menu) and then press a key for the submenu.
Sure, I understand.
What I don't fully understand, if you can set the shortcuts "z" and "1" (or any other key) in the app, why do you need BTT?
I thought, that BTT can do sequences as I need them.
This feature is super handy. Think on this:
Example from my daily work:
Sequences say: Hey! Why don't you press "Z" for Zoom and then you have the whole keyboard up for new shortcuts! You need "align"? Easy: Press "Z" to activate the Zoom-Container. Now press "A" for "aligned": DONE! And my brain: Nice! (as my workflow speed up...)
If @Andreas_Hegenberg knows any workaround I would be grateful for that!
