Found article regarding changing opacity of hyper terminal for Mac Os and Windowsbut not for Ubuntu.
How to change opacity for hyper terminal on Ubuntu?
21 Answer
It appears the hyper-opacity plugin only works on Windows and MacOS.
This seems to be an upstream issue: The hyper terminal is based on Electron, and hyper-opacity uses the Electron function BrowserWindow.setOpacity(). This function, according to the Electron docs, "does nothing" on Linux. According to this issue thread, this seems to be because Chrome / Chromium (which in turn is the basis for Electron) doesn't support changing the opacity on Linux.
In any case, it seems this is in the hands of the Electron developers to solve.
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