The Link Relations (to Note) functionality is useful - except there isn't enough metadata to reliably pick the right additional links (since you can't multiply select before attaching the Note/Constraint - feature request

)
Need to show which edges are visible on the diagram (as all the edges between the vertexes on the diagram are displayed in the list - and quite reasonably so)
Use an abbreviation for the edge type - control real estate is too precious to waste.
There's probably no need to repeat the "Class:" text (as above). If the Vertex is named then just name it. If not, use (ClasifierType) as a surrogate. Use
<---,
--->,
<--> and
---- to indicate the directionality.
If the edge is named add that.
If the edge has a stereotype add that (probably only the primary is sufficient).
If the edge has multiplicity, add those (around the vertexes)
If the edge has roles, add them...
Example:
[ ] Ass: «restrict» [0..*] (meronym ---> holonym) [1]Basically, give the user as much chance as possible to locate the right edges to attach the Note or Constraint to... Paolo
[size=0]©2006 Paolo Cantoni, -Semantica-[/size]