NetAppend
NetAppend[net, layer] appends a layer or a net onto a NetChain, a layer or a NetGraph with one output port.
NetAppend[net, "name" -> layer]appends a layer with a given name.NetAppend[net, {layer1, layer2, ...}]appends several layers or nets.
Examples
NetAppend[LinearLayer[10], SoftmaxLayer[]]NetAppend[NetChain[{LinearLayer[5]}], "output" -> ReshapeLayer[{5, 1}]]Please visit the official Wolfram Language Reference for more details.