From slack's Keyboard shortcut menu (ctrl+/):

Mark a message as unread --- Alt and click message

But this doesn't work :(

When I alt+click I get a clutched hand icon.

Running ubuntu 16.04.

1 Answer 1


alt+super+click works.

The problem is that alt+click is grabbed by the OS.

See more info here: https://askubuntu.com/q/521423/13330

  • thanks for your answer, it works for me!
    – desmond13
    Commented Mar 13, 2020 at 16:38

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