When Pulse has been added to a template it becomes an editable element in the Site console (see example image above). Mouse over a Pulse slideshow and a gear button will appear in its top right corner. Clicking the button produces a panel for editing slideshow dimensions, playback, behavior, transitions, and other options.
Once Pulse is in a template, theme designers may adjust its size and settings to their liking, which will then serve as the default settings for the slideshow. Publishers creating a site using the designer's theme may then edit the slideshow's settings (as explained above) if they'd like to.