Call this member function repeatedly to redraw a drag rectangle.

反复调用该成员函数以重新绘制一个拖动的矩形。

youdao

It is actually this rectangle that you drag to another element.

实际上是将这个矩形拖放到另一个元素。

youdao

Select the Rounded rectangle Tool (u) and then drag out your footer sized rectangle.

选择圆角矩形工具(U)在也叫拖动出一个圆角矩形。

youdao