If you have one or more channels open you can start making payments. If you used Quick Connect three channels were automatically opened with three nodes.
Let's walk through how to make a transfer.
After selecting a token network with open channels. Click on the "Transfer" button, this will bring open the transfer dialog.
If you accessed the transfer dialog from the all networks view, you can select the token network you want to make payments in also here.
Enter the receiving address.
Enter the amount.
Click "Send" to complete the transfer.