Patent ID: 8468489

Claim:
A computer aided design system of a device with a screen used in a printed circuit board (PCB) layout system for selecting targets on different layers of a PCB layout design, the device comprising at least one hardware processor and a non-transitory storage; and the computer aided design system comprising one or more programs, the one or more programs stored in the non-transitory storage, executable by the at least one processor, the one or more programs comprising: a dividing module adapted to divide the targets into different groups according to a predetermined rule, each group with a different label comprises a plurality of targets which are set on the different layers; an interface creating module adapted to create a user interface displaying the different labels of the groups and select at least one label of the groups according to a user's operation on the same user interface; a selecting module adapted to select the targets comprised in the selected at least one label of the groups; and a display module adapted to display the selected targets simultaneously on the screen.