diff --git a/artist/inset.go b/artist/inset.go
index 196b29b..971a1be 100644
--- a/artist/inset.go
+++ b/artist/inset.go
@@ -15,6 +15,28 @@ type Side int; const (
 // the left at index three. These values may be negative.
 type Inset [4]int
 
+// I allows you to create an inset in a CSS-ish way:
+//
+//   - One argument: all sides are set to this value
+//   - Two arguments: the top and bottom sides are set to the first value, and
+//     the left and right sides are set to the second value.
+//   - Three arguments: the top side is set by the first value, the left and
+//     right sides are set by the second vaue, and the bottom side is set by the
+//     third value.
+//   - Four arguments: each value corresponds to a side.
+//
+// This function will panic if an argument count that isn't one of these is
+// given.
+func I (sides ...int) Inset {
+	switch len(sides) {
+	case 1: return Inset { sides[0], sides[0], sides[0], sides[0] }
+	case 2: return Inset { sides[0], sides[1], sides[0], sides[1] }
+	case 3: return Inset { sides[0], sides[1], sides[2], sides[1] }
+	case 4: return Inset { sides[0], sides[1], sides[2], sides[3] }
+	default: panic("I: illegal argument count.")
+	}
+}
+
 // Apply returns the given rectangle, shrunk on all four sides by the given
 // inset. If a measurment of the inset is negative, that side will instead be
 // expanded outward. If the rectangle's dimensions cannot be reduced any
diff --git a/elements/file/directory.go b/elements/file/directory.go
index 3a7c785..2a2b567 100644
--- a/elements/file/directory.go
+++ b/elements/file/directory.go
@@ -56,7 +56,7 @@ func NewDirectory (
 	err error,
 ) {
 	element = &Directory { }
-	element.theme.Case = theme.C("files", "Directory")
+	element.theme.Case = theme.C("files", "directory")
 	element.Core, element.core = core.NewCore(element, element.redoAll)
 	element.Propagator = core.NewPropagator(element, element.core)
 	err = element.SetLocation(location, within)
diff --git a/theme/default.go b/theme/default.go
index e284207..dbfe765 100644
--- a/theme/default.go
+++ b/theme/default.go
@@ -254,28 +254,28 @@ func (Default) Padding (id Pattern, c Case) artist.Inset {
 	switch id {
 	case PatternRaised:
 		if c.Match("basic", "listEntry", "") {
-			return artist.Inset { 4, 8, 4, 8 }
+			return artist.I(4, 8)
 		} else {
-			return artist.Inset { 8, 8, 8, 8 }
+			return artist.I(8)
 		}
 	case PatternSunken:
 		if c.Match("basic", "list", "") {
-			return artist.Inset { 4, 0, 3, 0 }
+			return artist.I(4, 0, 3)
 		} else if c.Match("basic", "progressBar", "") {
-			return artist.Inset { 2, 1, 1, 2 }
+			return artist.I(2, 1, 1, 2)
 		} else {
-			return artist.Inset { 8, 8, 8, 8 }
+			return artist.I(8)
 		}
 	case PatternPinboard:
 		if c.Match("fun", "piano", "") {
-			return artist.Inset { 2, 2, 2, 2 }
+			return artist.I(2)
 		} else {
-			return artist.Inset { 8, 8, 8, 8 }
+			return artist.I(8)
 		}
-	case PatternGutter:     return artist.Inset { }
-	case PatternLine:       return artist.Inset { 1, 1, 1, 1 }
-	case PatternMercury:    return artist.Inset { 5, 5, 5, 5 }
-	default:                return artist.Inset { 8, 8, 8, 8 }
+	case PatternGutter:     return artist.I(0)
+	case PatternLine:       return artist.I(1)
+	case PatternMercury:    return artist.I(5)
+	default:                return artist.I(8)
 	}
 }