Selection Mode (9.0)
Context
Toolbar | 
As of version 9.0, there are now 3 selection modes that can be selected in the toolbar:
-
Rectangle: the default mode that selects
all the objects that are fully included in the rectangle defined with the mouse, -
Circle: a new mode that allows defining
the selection zone with a circle -
Lasso: a new mode that allows you to
freely draw the selection zone.
Example
Rectangle
Circle
Lasso
The selected mode is saved as the new default mode for all new graphs and sessions.