放大镜工具用作放大缩小您正在操作的图像。
选项
双击放大镜工具图标会得到可用的工具选项。
该选项允许包含有您的图像窗口按被缩放大小自动调整。
在放大和缩小选项间切换。
This option sets the size that a dragged zoom rectangle must be before zooming to that rectangle actually occurs. A higher Threshold will require a larger rectangle before zooming to that rectangle happens. If the size of the rectangle is too small the image is zoomed in by one level.