Pop-up documentation should not block the view to the cursor

[malte-v]

That should make the issue clear. I can't see what I'm editing because the documentation is in the way.

[pickfire]

I see this issue in kakoune quite often, so most of the time I just disable the popup because of this.

[archseer]

Yeah I was planning on placing the docs above if they get too close to the prompt. (Easy reasoning would be if the cursor is past the middle of the view: nvim-lua/completion-nvim@f099367#diff-13ac7f54ec22903ec9e2cd8a4874aceed4b78ece9e479d165d68631ecf4a3373R205)

Another option is a popup next to the completion, similar to compe (https://github.com/hrsh7th/nvim-compe#demo) but I find that harder to read than a pane at the top/bottom.