[niij]

Preferences --> Advanced --> Format messages with markup.

̶T̶h̶e̶ ̶o̶n̶l̶y̶ ̶d̶o̶w̶n̶s̶i̶d̶e̶ ̶i̶s̶ ̶t̶h̶a̶t̶ ̶m̶o̶d̶e̶ ̶d̶o̶e̶s̶n̶'̶t̶ ̶s̶u̶p̶p̶o̶r̶t̶ ̶m̶a̶r̶k̶d̶o̶w̶n̶ ̶s̶t̶y̶l̶e̶ ̶U̶R̶L̶s̶ ̶l̶i̶k̶e̶:̶ ̶ ̶[̶e̶x̶a̶m̶p̶l̶e̶ ̶s̶i̶t̶e̶!̶]̶(̶h̶t̶t̶p̶s̶:̶/̶/̶e̶x̶a̶m̶p̶l̶e̶.̶c̶o̶m̶)̶ Never mind, it looks like Slack has fixed this!

[ihuman]

They originally got rid of markdown completely when they added the WYSIWYG editor, then added that preference after people complained

[niij]

Yep, I remember that. It was quite the controversy at the time.

[goerz]

I think it does, but only when "Format messages with markup" is on, see https://slack.com/help/articles/202288908-Format-your-messag... and the asterisk at the bottom

[anderspitman]

THANK YOU

Honestly surprised I haven't come across this before.

Also, link formatting seems to be working for me?

[niij]

This was broken when I tried it out during the Markdown-->WYSIWYG switchover a while back. I updated my OP to show they have actually fixed this (go Slack!). I just switched back to Markdown again.