Select the channel (Email, Facebook, Twitter, LinkedIn, Instagram)
Depending on the channel there may be various “formats”, which are essentially, different layouts. Select the desired format.
Select the scheduled date and time and then click the "Create New" link
A new empty template for the promotion will be created. In the relevant sections you will see the text "<Replace this Headline with your own content...>"
Click the Edit link in the tool bar, and then select the section you want to add content to.
