I'm using Slack on elementaryOS and would like its notifications to stay on-screen for a longer duration so that I can read messages without switching focus to the app. Is there any way I can do this? I've looked in the Notification settings window and the dconf editor but couldn't find any relevant settings.
I believe Daniel's answer for a similar question in Loki may still be relevant to this in Juno. https://elementaryos.stackexchange.com/a/9571/9220