Plasma secrets: save session in Kate
Here’s a scenario for you. As a Linux person, you happen to be using the Plasma desktop environment, and your text editor of choice is Kate. You have multiple files open, i.e. multiple document tabs, and you want to preserve them for your next session. In the Kate settings, you did find the option that allows you to save the session, which you’ve promptly marked. However, on next app start, you only get a single, blank document.
▻https://www.dedoimedo.com/computers/plasma-kate-save-session.html