[nmarriott]

This is little to do with tmux and much to do with the features offered to terminal applications by terminal emulators. Both clipboard and mouse support in terminals generally is quite limited. For the clipboard, this page documents how to configure it within the limits of what is possible: https://github.com/tmux/tmux/wiki/Clipboard

[p1esk]

That's the main problem with tmux in my experience, whenever I open an issue or a feature request on tmux github, the devs say it's a terminal issue. I then open the same issue on the terminal github and the devs there say it's a tmux problem.

Perhaps a solution could be combining a terminal and tmux into one product, so there would be no more excuses, however I don't think core devs are interested in getting a proper mouse support working in tmux.