Within OneView navigate to the desired campaign and select "Add Links".
From the Add Bitlinks section paste the long URL you want to make into bitlinks in the highlight box on the right hand side. Here you'll see all the Included Channels you are creating bitlinks for. When multiple channels are selected we will auto add UTM parameters to the destination URL in order to create unique Bitlinks for each channel.
When you are finished select "Create" at the bottom of the page and the bitlinks will be created for the desired channels within the campaign.