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Re:Regarding the Em Dash by Symbiote on Sunday January 07, 2018 @04:25AM (#16090046)
On Linux, you don't.

> setxkbmap -option compose:menu

For example. There will be a dialog somewhere too.

Re:Regarding the Em Dash by Freak_NL on Sunday January 07, 2018 @05:34AM (#16090270)
> There will be a dialog somewhere too.

In Ubuntu Unity and — I think — Gnome Shell:

Keyboard settings » Shortcuts » Typing » Compose key

Re:Regarding the Em Dash by BenjiWiebe on Sunday January 07, 2018 @02:53PM (#16092322)
And KDE, IIRC: system settings, input settings, keyboard, advanced, compose key.
Re:Regarding the Em Dash by Dylan16807 on Sunday January 07, 2018 @03:45PM (#16092590)
For an average computer, you're neglecting the step where you install Linux.

Even specially enabling it is a real barrier in many ways.