Slip-edit weirdness

So tired of trying to figure out why Sonar X3 changes on me overnight. Today, I cannot grab the end of a clip and slip-edit it. The Smart or Edit options do nothing when I hover over the END of a clip and attempt to shrink it (which I have done approximately 1 billion times since I stared with Cakewalk for DOS and have stayed patient up til now). I have RTFM'd, scanned posts and I guessing the answer is in the Forums somewhere, but you know what? Time is money. Anybody seen this and can you tell me what is goofed up. I have checked the Clips view and made sure looping is off, but other than that, I can't find any stupid reason why this is happening.
Thank you for listening.

Thanks for responding. I did figure it out after posting my frustration: it is my learning curve, having worked out a very efficient (for me) workflow in 8.5, and hanging on to that version for a long time left me confused with much of the interface options in X3. I found that it is the track's "Clips/Notes/Automation" drop down. If it is set to "volume" under Automation, it is only possible to play with the volume envelope, but not crop/move the clip. Setting it back to 'clips' allows me to manipulate the clip (slip-edit, etc.) but not edit the volume. So, I am learning that this little drop-down on each track is my key. I've also had enormous challenges with accidental 'hot-key' input (fat fingers) that left my interface a mess. So, my learning curve is still steep - I like to write/record music, not take interminable tutorials on how to use the software, and that is my challenge. :-) All good for today. If this helps anyone else with 'the power' of X3 and its inherent challenges, then good. Thanks, again!