@Marco Busycleta - There is no way for users to toggle the left-hand side content creation toolbar on/off.

If this is happening, then I would tend to jump to the conclusion that you are using Miro in a browser and that it the issue is related to browser memory or an extension.

To troubleshoot the issue using process of elimination, try:

1. Closing/re-opening the browser
2. Clearing the cache
3. Disabling all extensions - usually opening a private/incognito window works
4. Try another browser
5. Try the Miro desktop app

@Marco Busycleta - The only way I know of that the content creation can be completely hidden is if you are on the board as a Guest editor and then the board owner switches the board’s Share settings from Anyone with the link → Can edit to Can view:

So, if that were case here, I suppose it is possible that someone could be playing tricks on you. 

Nobody else was in the board so the only way was to refresh the browser window

@Marco Busycleta - To clarify, a user would not have to be on the board to change the Share settings - this can be done from the Miro dashboard too (but, yes, it was very unlikely that someone was messing with you  ) However, keep this in mind for April 1, 2022