How to configure VGG-16 and VGG-19

How to use pre-trained VGG-19 and 16, how to configure in deep cognition studio? As there are available , i just drag and drop but it was not working, is there any extra layers needs to attached other than input and output layers?

No you just need to directly add the layer after the input layer.
If you are including top layer then the input should be same as used in the model designing otherwise you just need to follow the min dimension required for using different pre-trained layer.