Edge
Selection
When you are
working with edges several selection options are available which
will help you speed up the selection process. These options become
available when you are prompted for a selection and choose Select
> Selection Type > Edges (2).
Edge
Loops
Once you have selected your
first edge, you can press l
or Ctrl-RMB > Select Partial
Edge Loop to loop your selection until it either
hits another selected edge or a point where any number of edges
other than four meet.

To extend the
loop beyond any existing selected edges, you can press Shift
- l or Ctrl-RMB
> Select edge loop. A full edge loop will
still stop when it
hits a point where any number of edges other than four meet.

Next
Edge Selection Once
you have one edge selected, you can press the f
key, or Ctrl-RMB
> Select next edge to add to the selection.
The red arrow indicates the direction in which the new selection
will be added.

Edge
Direction If
you want to use the Next edge option
to add to your selection then the direction of the red arrow is
important. If it is pointed in the wrong direction then you can
press the r
key, or Ctrl-RMB > Reverse edge
direction to switch its direction.

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