And I don't know if this applies, but I found it by searching for 'note properties' in the documentation:
Notation and lyrics ► Basic musical editing ► Changing note properties
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Changing note properties
The Staff view lets you edit all the MIDI parameters for a note, including those not normally portrayed by standard musical notation. Note properties are as follows:
To edit a note’s properties
1. Select the Smart tool in the Control Bar and
double-click the note to open the Note Properties dialog box.
2. Edit the note’s properties, as described in the table (I did not include this here)
3. Click OK.
SONAR changes the note’s parameters and redraws the note if necessary
Bob Bone