Threads would be a very nice feature of Slack, except that they are way too narrow and I can't find any way to configure their width.
Does anyone know how to expand a thread to make it take up all the screen real estate (within Slack)? Zooming in doesn't change the narrowness. It just makes the fonts bigger. I want to collapse the channel discussion and have the thread occupy the full width of the slack message area. Not possible?
I noticed this week, seemingly without any announcements, that the slack app now natively supports resizing the "right-hand bar" where threads are typically rendered.
So, to answer the original question, drag it.