Final answer:
To change a story opening to in medias res, an author should begin with action already in progress, hook the reader with immediate conflict, and weave background information throughout the narrative rather than presenting it upfront.
Step-by-step explanation:
To give a story an in medias res opening, the author would need to begin with some action already in progress. This type of opening completely inverts the traditional Freytag's Pyramid structure by thrusting the reader into the midst of an unfolding scene, often without the prior knowledge that typically comes from exposition. An in medias res beginning usually provides immediate, high-powered action or conflict which captures the reader’s attention and incites curiosity.
In medias res is a narrative technique that means "in the middle of things". By using this approach, the background information, such as the introduction of main characters and setting, is delayed or woven into the narrative through dialogue and other details as the story unfolds. Often, the inciting incident has already taken place or occurs right at the start, leaving the reader to piece together the backstory and context as they progress through the narrative.
The story beginning must be gripping, setting the tone with a sense of urgency or intrigue, forcing readers to want to know more about the characters, the setting, and the conflict at hand. It's an effective way to engage readers, making them feel as if they have jumped straight into the thick of the narrative, eager to understand what led to these events and what will happen next.