Adjusting volume on individual clips

ProjectM
You are correct, you can. On the track header, there's a small drop down meny thingy called Edit Filter. From there you can select all envelopes that you are able to have in your tracks and from there you choose Clip Gain. Each clip get it's own gain envelope and you can adjust until you're happy

Would be nice if the waveform was scaled to the gain amount like in Samplitude.

Over the track view clip pane press "T" or click the middle mouse button. This will bring up the HUD with the edit filter toward the right of it. As ProjectM has already said there is also a widget in the Track View header area but you need to make sure the widget manager is set to display it there.
 
From the edit filter select clip gain. You'll now be able to adjust clip gain using the envelope. Click drag on it to create and adjust nodes if you don't want a straight adjustment.
 
To create a fade, click drag toward the top right or left corner of a clip where you'll see a red line appear and the cursor change to the fade cursor to indicate that click dragging will create a fade. Fade type can be adjusted using the TV---->Options---->Crossfade type menu choices.
 
And finally I have a video on my youtube page explaining the edit filter. There are others there you  may find helpful and I also author more detailed videos that you can buy from either SWA or the Cakewalk store
 
HTH

For an audio clip, in addition to the above methods you can also Ctrl+Drag downward on the upper portion of the clip - that will expose the clip gain envelope and keep it on the cursor for placement.
 

Thanks for the brainwaves peeps.  Velocity seems to be the only option to apply volume automation to a single clip - in my X2 configuration that is.   So props to brundlefly (great handle BTW) and thanks to all.

Tried the mouse wheel click... smart tools does come up but clip velocity is still the only option available.