How can you display a single guide when a user clicks a button or link?

Creating a Visualforce page for the guide is the most effective method to display a single guide when a user clicks a button or link. Visualforce pages allow developers to create customized user interfaces within Salesforce, offering the flexibility to define how information is presented and interacted with.

By using a Visualforce page, you can control the layout and behavior of the guide when a user initiates the action (clicking a button or link). This approach provides a clean and tailored user experience, ensuring users see only the desired guide in response to their interaction.

In contrast, the other options either do not directly facilitate this specific interaction or involve elements that may not provide the same level of customization. For instance, changing guide properties or setting triggers based on record changes may not ensure that the guide is displayed explicitly when a user takes the action of clicking a button or link. A custom page layout, while useful, does not inherently link the guide’s display to user actions in the same dynamic way that a Visualforce page allows.