No, dear readers, as the Internet might have you believe, none of these things work on a 2017 Macbook Pro, the kind with the touchbar:

  • Fn+Enter
  • Fn+M
  • Fn+.
  • Fn+Option+Enter

Somehow, someway, when I was pasting some text I ended out getting into overtype mode in Slack and now it's stuck that way.

Internet documentation might work if I had an older computer or one with keys that I don't have, but there's nothing I've been able to find that will tell me how to turn off this dratted overtype mode. And it's seriously annoying.

Any clue how to turn it off?

  • 1
    Did you contact Slack support on this? – nohillside Nov 3 '17 at 14:26
  • @patrix not yet - I had a look in the slack help and there was nothing which suggests it is an macOS issue :-\ – Wayne Werner Nov 3 '17 at 14:33
  • I just now have the same issue! – Harlan Nov 6 '17 at 15:31
  • 1
    So frustrating! – Brian Wigginton Nov 21 '17 at 18:24

Closing and restarting Slack worked for me... But yeah, super annoying!

  • Just had this happen to me, had to restart Slack as well - it's like the old Windows days, just reboot to fix.... – ckm Nov 29 '17 at 18:50

I contacted Slack support and was told to use +R to do a quick refresh and reset the mode from overwrite to insert.

From Slack support team:

Thanks for writing in about this! We've seen this occur on Mac computers recently as well, and the good news is there is an easy way to switch! To reset the mode from overwrite to insert, this should be possible with a quick refresh using Cmd+R

Explanation: This is because slack is using electron, which is essentially a wrapper around a browser to create a desktop app. Other "web" commands work like +[ and +] to traverse your "browser history" backward and forward, respectively.

  • FYI this workaround also works on Ubuntu using Strg+R – ATN Aug 22 '18 at 7:39
  • 1
    Just a refresh didn't work for me. I had to close the chrome tab and reopen it. – Semimono Dec 17 '18 at 23:52

I am using an old Apple keyboard. The 'help' button turns on/off the overwriting function on the computer.

  • +1 While your answer might not have been specific to the question it solved my problem in R Studio. – Michael S Taylor Dec 4 '18 at 19:26
  • Thanks for this. I'm also using an older Mac keyboard and this fix it for me too. – Mike Yockey Jan 15 at 20:03
  • This should be the correct answer as it's not specific to any environment/app – pedram bashiri Apr 17 at 18:03

Ctrl-r for you windows users out there

  • 1
    Welcome to Ask different. While It's great that you are keen to contribute to Ask Different, I am not sure that sharing Windows shortcuts on a website, and question which is specifically about macOS issues is the right approach. – unknowndomain Aug 13 '18 at 21:21
  • 1
    Thanks, worked for me. I landed here by accident, I am currently using Windows. – Nina Sep 4 '18 at 16:02

I know this an apple SE, but some of us use Mac and Windows. In my case, using a Windows laptop in a docking station, pressing the Insert key from the external keyboard didn't solve the problem, but pressing the Insert key on the laptop's built-in keyboard solved it.

TL/DR: If you use an external keyboard, try clicking Insert key on the built-in keyboard.


I'm using it on a windows 10 machine in chrome. Control-r doesn't seem to work here. Even though I had closed the chrome browser and shut down the machine, when I brought it back up the next day it was still in overtype mode. I had to close that tab in the browser and then open slack in the browser again to go back into insert mode.


Press "instert" on your keyboard. Fixed.

  • That's one of the shortcuts I tried that didn't work – Wayne Werner Mar 24 at 14:17
  • This totally worked for me, not sure why you got down voted. – Goro Apr 23 at 2:31

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