Hi,
my cat jumped on my computer and now I have this blue things on my track, I did not succeed to remove them, neither restarting Audacity. What did happen?
Photo
https://ibb.co/hZXrycx
Your cat probably hit the F6 key (multi-tool). Press the F1 key to get back to the normal “select” tool.
See also: https://manual.audacityteam.org/man/tools_toolbar.html