Piano Roll Midi Notes Lenght

You could "lasso" them (right click, and drag to select), and drag (left click at the end of any clip) them together to desired length. You can also hover the mouse over the top of the clip, until you see a "pen with some bars over it), left click, and drag (up or down) to desired velocity / volume. Or ctrl right click, and choose MIDI effects, Cakewalk, velocity, change velocity and enter desired increase / decrease.
Best of luck

Try using the events editor in the command bar. I think that will work.

icontakt
Hey, why don't we use the new, easiest method? Select the note events, hold down the Shift key and adjust the right edge of one of the events.
http://www.cakewalk.com/Documentation?product=SONAR&language=3&help=NewFeatures.43.html
 

My understanding of that reference is that it will produce scaling of all selected values by the same ratio. What the OP is apparently trying to do is to set the actual notes to the same absolute values. If the values are not identical at the outset, the referenced maneuver will not equalize them. Selecting the notes via event filter, and replacing the values with the desired value would seem to be the easiest way to do what he wants.

Have you tried selecting all the notes...then right clicking on one note and adjust the properties manually?  Haven't tried it myself, but seems as though it should work if you have multiple notes highlighted.

DRanck
Try using the events editor in the command bar. I think that will work.

This is the best answer by far
 
Make your selection and type the desired length in the box
 
Note: if your target length is say, 120 ricks and the first note in your selection is already this length then it will not work. 2 ways to over come this, either re-select the range ensuring the first note needs correcting, or (especially if it's a complex range of non-contiguous notes), using the example above, first type 121 and enter, then hit 120 and enter.

Bristol_Jonesey

DRanck
Try using the events editor in the command bar.

This is the best answer by far
 

It think it depends. icontakt's method works faster if you already have snap selected in PRV, just shift+click+drag. But if you don't have snap at a comfortable value, then the Events Editor is great - especially because you can select an entire clip (don't need to be in PRV), type...done.

Anderton

Bristol_Jonesey

DRanck
Try using the events editor in the command bar.

This is the best answer by far 

 
It think it depends. icontakt's method works faster if you already have snap selected in PRV, just shift+click+drag. But if you don't have snap at a comfortable value, then the Events Editor is great - especially because you can select an entire clip (don't need to be in PRV), type...done.

 
Well, in that case, I would say a CAL script like the one below is the fastest in both TV and PRV. You just select the clip or notes and hit the keyboard shortcut assigned the CAL. I use Alt+4, Alt+6, Alt+8, etc.
But still, I use Shift+click+drag in the PRV, because my right hand doesn't need to leave the mouse. It's a handy new feature not known by many.
 
;; Duration 16th.cal
;;
;; This is a sample CAL program that implements an editing command to
;; set all note durations to 16th.
;;
(do
(forEachEvent
(if (== Event.Kind NOTE)
(do
(= Note.Dur 240)
)
)
)
)
 
 

Bristol_Jonesey 
 
Note: if your target length is say, 120 ricks and the first note in your selection is already this length then it will not work. 

 
Yes, this is a bug and I'm wondering when it gets fixed.
 
 
[Edit: cross-posted with William]

Thanks to everybody, always very useful