Track looks weird

Help. I pressed a wrong key and all tracks created now look like this. I have searched the menu and this didn’t help. I can’t see an explanation in the manual. There is no such notation treated in the Tracks section.

How do I get out of this?
Thanks
Screen Shot 2018-06-26 at 12.08.54.png

That’s the envelope tool. You can use that to drag and change the volume in tiny bits if you need to.

It’s the two black arrows and bent line in the tool bars at the top. For regular editing, you can use the I-Beam tool.

Koz

Ah got it. Thanks heaps.