diff --git a/grid.go b/grid.go
index 087b333..ca2d5b9 100644
--- a/grid.go
+++ b/grid.go
@@ -21,7 +21,7 @@ type Grid struct {
 	controls                 [][]Control
 	filling                  [][]bool
 	stretchyrow, stretchycol int
-	widths, heights, yoff          [][]int // caches to avoid reallocating each time
+	widths, heights          [][]int // caches to avoid reallocating each time
 	rowheights, colwidths    []int
 }
 
@@ -42,14 +42,12 @@ func NewGrid(nPerRow int, controls ...Control) *Grid {
 	cf := make([][]bool, nRows)
 	cw := make([][]int, nRows)
 	ch := make([][]int, nRows)
-	cyoff := make([][]int, nRows)
 	i := 0
 	for row := 0; row < nRows; row++ {
 		cc[row] = make([]Control, nPerRow)
 		cf[row] = make([]bool, nPerRow)
 		cw[row] = make([]int, nPerRow)
 		ch[row] = make([]int, nPerRow)
-		cyoff[row] = make([]int, nPerRow)
 		for x := 0; x < nPerRow; x++ {
 			cc[row][x] = controls[i]
 			i++
@@ -62,7 +60,6 @@ func NewGrid(nPerRow int, controls ...Control) *Grid {
 		stretchycol: -1,
 		widths:      cw,
 		heights:     ch,
-		yoff:		cyoff,
 		rowheights:  make([]int, nRows),
 		colwidths:   make([]int, nPerRow),
 	}
@@ -145,12 +142,11 @@ func (g *Grid) setRect(x int, y int, width int, height int, rr *[]resizerequest)
 	// 2) get preferred sizes; compute row/column sizes
 	for row, xcol := range g.controls {
 		for col, c := range xcol {
-			w, h, yoff := c.preferredSize()
+			w, h := c.preferredSize()
 			g.widths[row][col] = w
 			g.heights[row][col] = h
 			g.rowheights[row] = max(g.rowheights[row], h)
 			g.colwidths[col] = max(g.colwidths[col], w)
-			g.yoff[row][col] = yoff
 		}
 	}
 	// 3) handle the stretchy control
@@ -178,7 +174,7 @@ func (g *Grid) setRect(x int, y int, width int, height int, rr *[]resizerequest)
 				w = g.colwidths[col]
 				h = g.rowheights[row]
 			}
-			c.setRect(x, y + g.yoff[row][col], w, h - g.yoff[row][col], rr)
+			c.setRect(x, y, w, h, rr)
 			x += g.colwidths[col]
 		}
 		x = startx
@@ -188,7 +184,7 @@ func (g *Grid) setRect(x int, y int, width int, height int, rr *[]resizerequest)
 }
 
 // filling and stretchy are ignored for preferred size calculation
-func (g *Grid) preferredSize() (width int, height int, yoff int) {
+func (g *Grid) preferredSize() (width int, height int) {
 	max := func(a int, b int) int {
 		if a > b {
 			return a
@@ -206,8 +202,7 @@ func (g *Grid) preferredSize() (width int, height int, yoff int) {
 	// 2) get preferred sizes; compute row/column sizes
 	for row, xcol := range g.controls {
 		for col, c := range xcol {
-			// ignore yoff for preferred size calculations
-			w, h, _ := c.preferredSize()
+			w, h := c.preferredSize()
 			g.widths[row][col] = w
 			g.heights[row][col] = h
 			g.rowheights[row] = max(g.rowheights[row], h)
@@ -221,7 +216,5 @@ func (g *Grid) preferredSize() (width int, height int, yoff int) {
 	for _, h := range g.rowheights {
 		height += h
 	}
-
-	// yoff is always zero for grids
-	return width, height, 0
+	return width, height
 }
diff --git a/stack.go b/stack.go
index 17df63a..bbc78ec 100644
--- a/stack.go
+++ b/stack.go
@@ -25,7 +25,7 @@ type Stack struct {
 	orientation   orientation
 	controls      []Control
 	stretchy      []bool
-	width, height, yoff []int // caches to avoid reallocating these each time
+	width, height []int // caches to avoid reallocating these each time
 }
 
 func newStack(o orientation, controls ...Control) *Stack {
@@ -35,7 +35,6 @@ func newStack(o orientation, controls ...Control) *Stack {
 		stretchy:    make([]bool, len(controls)),
 		width:       make([]int, len(controls)),
 		height:      make([]int, len(controls)),
-		yoff:		make([]int, len(controls)),
 	}
 }
 
@@ -93,8 +92,7 @@ func (s *Stack) setRect(x int, y int, width int, height int, rr *[]resizerequest
 			nStretchy++
 			continue
 		}
-		w, h, yoff := c.preferredSize()
-		s.yoff[i] = yoff
+		w, h := c.preferredSize()
 		if s.orientation == horizontal { // all controls have same height
 			s.width[i] = w
 			s.height[i] = height
@@ -122,7 +120,7 @@ func (s *Stack) setRect(x int, y int, width int, height int, rr *[]resizerequest
 	}
 	// 3) now actually place controls
 	for i, c := range s.controls {
-		c.setRect(x, y + s.yoff[i], s.width[i], s.height[i] - s.yoff[i], rr)
+		c.setRect(x, y, s.width[i], s.height[i], rr)
 		if s.orientation == horizontal {
 			x += s.width[i]
 		} else {
@@ -133,7 +131,7 @@ func (s *Stack) setRect(x int, y int, width int, height int, rr *[]resizerequest
 }
 
 // The preferred size of a Stack is the sum of the preferred sizes of non-stretchy controls + (the number of stretchy controls * the largest preferred size among all stretchy controls).
-func (s *Stack) preferredSize() (width int, height int, yoff int) {
+func (s *Stack) preferredSize() (width int, height int) {
 	max := func(a int, b int) int {
 		if a > b {
 			return a
@@ -145,11 +143,10 @@ func (s *Stack) preferredSize() (width int, height int, yoff int) {
 	var maxswid, maxsht int
 
 	if len(s.controls) == 0 { // no controls, so return emptiness
-		return 0, 0, 0
+		return 0, 0
 	}
 	for i, c := range s.controls {
-		// ignore yoff for preferred size calculations
-		w, h, _ := c.preferredSize()
+		w, h := c.preferredSize()
 		if s.stretchy[i] {
 			nStretchy++
 			maxswid = max(maxswid, w)
@@ -172,9 +169,6 @@ func (s *Stack) preferredSize() (width int, height int, yoff int) {
 	} else {
 		height += nStretchy * maxsht
 	}
-
-	// yoff is always zero for stacks
-	yoff = 0
 	return
 }