LayoutControl.AllowHorizontalSizing Attached Property
Gets or sets whether horizontal re-sizing is enabled for a specific child element of the LayoutControl. This is an attached property.
true if horizontal re-sizing is enabled for a specific child element of the LayoutControl; otherwise, false.
If the AllowHorizontalSizing property is set to true for a specific item, a sizer is displayed next to the item, enabling horizontal re-sizing. In the following image horizontal re-sizing is enabled for the first item:
The LayoutControl.AllowItemSizing property allows you to temporarily disable horizontal and vertical re-sizing of items within the LayoutControl. If this property is set to false, the AllowHorizontalSizing and LayoutControl.AllowVerticalSizing attached properties are ignored.