diff --git a/layout_flags.go b/layout_flags.go
index 4c317ab..504e869 100644
--- a/layout_flags.go
+++ b/layout_flags.go
@@ -75,8 +75,9 @@ const (
 	LFSizeAll = LayoutFlag(0x11110000)
 )
 
-func (f LayoutFlag) Add(fl LayoutFlag)    { f |= fl }
-func (f LayoutFlag) Remove(fl LayoutFlag) { f = f &^ fl }
+func (f LayoutFlag) Has(fl LayoutFlag) bool { return f&fl != 0 }
+func (f LayoutFlag) Add(fl LayoutFlag)      { f |= fl }
+func (f LayoutFlag) Remove(fl LayoutFlag)   { f = f &^ fl }
 func (f LayoutFlag) ClearAll() {
 	f.ClearAllAlign()
 	f.ClearAllSize()