Can I avoid setting an explicit size to a widget? When you place an object in Builder Xcessory, you implicitly provide a width and height for the object. If you don't want to set the width and height, use the Natural Size action from the Main Window Edit menu or from the MB3 Quick Access menu in the Browser Tree or on the object itself. By setting Natural Size, the child widget will automatically adjust to changes in the size of its parent. Read more about Can I avoid setting an explicit size to a widget?