This is really two questions:
(1) [Is there a]/[what is the] compose key sequence for the obelus or dagger symbol?
(2) How can I get to work, so as to be able to enter unicode characters into a text file?
I can use compose-key sequences to produce symbols such as €, ü, etc., no problema. So I presume I could use a compose-key sequence to input an obelus or dagger symbol. But I cannot find any trace of an appropriate sequence.
The link (e.g.) https://unicode-table.com/en/2020/ tells me that the hex code or "code point" for the obelus or dagger symbol is 2020.
So I should be able to type
2020
to get the symbol I want. But this doesn't work. Instructions that I've seen say that I've seen say that when I press an underscored "u" should appear. But it doesn't. Is there any way I can track down what is going wrong, and fix it?
I'm running Ubuntu 22.04 with a Mate 1.26.0 desktop.
Thanks.