QScrollArea *scrollArea = new QScrollArea(this); scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
QScrollArea *scrollArea = new QScrollArea(this); scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);This example sets the vertical scrollbar policy to only appear when necessary, meaning it will only appear if the contents are larger than the visible area. Package Library: Qt Core and Qt Widgets.