A button on the end of a scroll bar which can be pressed to move the current position.
A button on the end of a scroll bar which can be pressed to move the current position.
移动按钮：位于滚动条底部，点击可移动当前位置的按钮。
A button on the end of a scroll bar which can be pressed to move the current position.
移动按钮：位于滚动条底部，点击可移动当前位置的按钮。