击老鼠右键，check “select net”, select the net you want to add via, usually, GND net, the GND is high light. Then right click mouse again, select “ add via”, then you can add vias which are connected to GND net. Freely and put them wherever you want. Remember, if the GND net is hide and set to a special color, no connection for these vias, but they are same color as other pads and trace in GND net.[size=3]文字[/size]
