diff --git a/elements/core/core.go b/elements/core/core.go
index cb12959..5d5c96d 100644
--- a/elements/core/core.go
+++ b/elements/core/core.go
@@ -27,46 +27,47 @@ func NewCore (parent tomo.Element) (core *Core, control CoreControl) {
 	return
 }
 
-func (core Core) ColorModel () (model color.Model) {
+func (core *Core) ColorModel () (model color.Model) {
 	return color.RGBAModel
 }
 
-func (core Core) At (x, y int) (pixel color.Color) {
+func (core *Core) At (x, y int) (pixel color.Color) {
 	return core.canvas.At(x, y)
 }
 
-func (core Core) Bounds () (bounds image.Rectangle) {
+func (core *Core) Bounds () (bounds image.Rectangle) {
 	return core.canvas.Bounds()
 }
 
-func (core Core) Set (x, y int, c color.Color) () {
+func (core *Core) Set (x, y int, c color.Color) () {
 	core.canvas.Set(x, y, c)
 }
 
-func (core Core) Buffer () (data []color.RGBA, stride int) {
+func (core *Core) Buffer () (data []color.RGBA, stride int) {
 	return core.canvas.Buffer()
 }
 
-func (core Core) Selectable () (selectable bool) {
-	return core.selectable
+func (core *Core) MinimumSize () (width, height int) {
+	return core.metrics.minimumWidth, core.metrics.minimumHeight
 }
 
-func (core Core) Selected () (selected bool) {
-	return core.selected
-}
-
-func (core Core) AdvanceSelection (direction int) (ok bool) {
-	return
+func (core *Core) Resize (width, height int) {
+	if width < core.metrics.minimumWidth {
+		width = core.metrics.minimumWidth
+	}
+	if height < core.metrics.minimumHeight {
+		height = core.metrics.minimumHeight
+	}
+	bounds := core.canvas.Bounds()
+	if width != bounds.Dx() || height != bounds.Dy() {
+		core.canvas = tomo.NewBasicCanvas(width, height)
+	}
 }
 
 func (core *Core) SetParentHooks (hooks tomo.ParentHooks) {
 	core.hooks = hooks
 }
 
-func (core Core) MinimumSize () (width, height int) {
-	return core.metrics.minimumWidth, core.metrics.minimumHeight
-}
-
 // CoreControl is a struct that can exert control over a control struct. It can
 // be used as a canvas. It must not be directly embedded into an element, but
 // instead kept as a private member.
@@ -79,22 +80,6 @@ func (control CoreControl) HasImage () (empty bool) {
 	return !control.Bounds().Empty()
 }
 
-func (control CoreControl) Select () (granted bool) {
-	return control.core.hooks.RunSelectionRequest()
-}
-
-func (control CoreControl) SetSelected (selected bool) {
-	if !control.core.selectable { return }
-	control.core.selected = selected
-}
-
-func (control CoreControl) SetSelectable (selectable bool) {
-	if control.core.selectable == selectable { return }
-	control.core.selectable = selectable
-	if !selectable { control.core.selected = false }
-	control.core.hooks.RunSelectabilityChange(selectable)
-}
-
 func (control CoreControl) PushRegion (bounds image.Rectangle) {
 	control.core.hooks.RunDraw(tomo.Cut(control, bounds))
 }
@@ -123,17 +108,14 @@ func (control CoreControl) SetMinimumSize (width, height int) {
 
 	// if there is an image buffer, and the current size is less
 	// than this new minimum size, send core.parent a resize event.
-	bounds := control.Bounds()
-	imageWidth,
-	imageHeight,
-	constrained := control.ConstrainSize (
-		bounds.Dx(),
-		bounds.Dy())
-	if constrained {
-		core.parent.Handle (tomo.EventResize {
-			Width:  imageWidth,
-			Height: imageHeight,
-		})
+	if control.HasImage() {
+		bounds := control.Bounds()
+		imageWidth,
+		imageHeight,
+		constrained := control.ConstrainSize(bounds.Dx(), bounds.Dy())
+		if constrained {
+			core.parent.Resize(imageWidth, imageHeight)
+		}
 	}
 }