Now all my meters in track view are horizontal and the whole layout looks screwed up.  I have no idea what key I accidentally touched or how to get back to normal.
 
Whoever thought it was a good idea to landmine the entire keyboard with no way to turn these shortcuts off really screwed up.  This is enraging me.
 
How do I get back to normal?
 
UPDATE:  I found Horizontal Meters in the Track View Options and made the meters vertical again, but there are still things missing from the track view so I must have touched some key that did multiple things to the view.  For example, volume and pan are no longer displayed in the individual tracks (under the Read/Wrtie options).

Have you tried switching screen sets to revert it?

Also, hate to say it like this but... you can make a keyboard shortcut that will revert your screen back to the previous view state. Not sure it works for everything, but it works for a lot. Mine is mapped to Alt+H, and it starts stepping back through previous views (or something similar to that).

Thanks, Michael, but since I don't ever use screen sets, I would be taking a chance that the screenset I tried would make things worse.  I don't think screensets toggle, do they?  In other words, if I tried 2 and it was even more screwed up, hitting 2 again wouldn't get rid of the change, would it?
 
I have gotten back to normal for the most part by checking help and fixing one thing at a time in the view, but, really, what a waste of time.  It should not be so easy to do something so radical without an UNDO key.

There are default screen sets already loaded into SONAR, so in "worst" case can set it back to those. Once you have a view you like, it is good practice to save that as a screen set (and update accordingly).
 
Anther option (if you saved recently) is to simply close the file without saving and re-open it, or save a screen set from another project (import screen sets).

"1" is the default screenset, so hitting 1 should get you back to the "main" view you're used to. Changing screensets can easily happen when you intend to enter a value and inadvertently fail to get the value field into editing mode first. If you really don't need screensets you can bind all the number keys to "Do Nothing". All the "landmines" on the keyboard can potentially be disabled this way.

I thought you could set the bindings to "none" or whatever.
 
I should actually look into this because although I very rarely hit the wrong hotkey it is indeed, as you said, a bit of a minefield. I use the keyboard quite often but only for specific things. I hate second guessing whether I did something catastrophic when I bumblehand something because some of those binding do things not so apparent depending on what you are doing.

The two shortcuts everybody must know...
 
CTRL + Z
ALT + Z

CakeAlexS
The two shortcuts everybody must know...
 
CTRL + Z
ALT + Z

Yeah but certain things that can get accidentally hit (like GUI or parameter changes) don't end up in the History been so those do nothing. Konrad seems to be experiencing GUI change woes. Not sure how he pulled that one off but I've had similar things happen and it is quite annoying. Fortunately I save VERY frequently so if I do something like that I just close and reopen the program and all is good.

Hi, Konrad.
 
I did have a quick look through the keybindings, but didn't find the ones you may have inadvertently hit.  I'll keep looking, though, when I get a chance.
 
One I had trouble with for ages was hitting "E" instead of "R".  It took a while to figure out why everything sounded wrong.
 
Although Ctrl+z and Alt+z are very useful (especially, for me, when tracking ) there are a multitude of things they do not cover.
 
Can you imagine how convoluted your "Undo History" would become if every tweak of EQ parameter, Compressor, Track Fader etc. were included?
 
That's not to say there haven't been times when I'd wished they were, but, as Beepster said, "Saving" is the saviour here.