Thanks for your reply! My two questions are:
1. It says in the documentation that
(Quote)
However, when I open this new LayoutView in the pop-up window, there is no tool bar button to press, so the plugin never gets activated (and the Select tool …
I'm saying that the latest version of Klayout has dependencies that do not come standard in the Ubuntu18.04 apt repository, and I'm wondering if I have to install them manually, or if there's some other workaround that the builders use.