How to quickly turn off/on some layers in CAD Reader? (Close select and Open select)

Quickly turn off some layers (Close select):

1. Click the Layers button to open the management interface.
2. Click the golden bulb “close select”, left click to choose elements you want turn off or click again to cancel previous selections, and then right click to finish. 
3. Prompt box pops up and the bulbs of closed layers turn off.

Quickly turn on some layers (Open select):

1. Click the Layers button to open the management interface.
2. Click the golden bulb “open select”, left click to choose elements you want or click again to cancel previous selections, and then right click to finish.
3. Prompt box pops up and the bulbs of opened layers turn on.

Tips: What’s more, on the layer management surface, you could turn on or turn off the golden bulbs on the left to open or close certain layers.