diff --git a/gg/scale.go b/gg/scale.go
index <HASH>..<HASH> 100644
--- a/gg/scale.go
+++ b/gg/scale.go
@@ -275,7 +275,7 @@ func defaultRanger(aes string) Ranger {
 		return &defaultColorRanger{}
 
 	case "opacity":
-		return NewFloatRanger(0, 1)
+		return NewFloatRanger(0.1, 1)
 
 	case "size":
 		// Default to ranging between 1% and 10% of the
gg: change default opacity range to [<I>,1]

Currently it goes from 0 to 1, but you can't see something that 0%
opaque, so bring up the lower bound to where it's visible.