If a field exists in search results but isn't displayed in the sidebar, what can be done to add it?

When a field exists in the search results but isn't displayed in the sidebar, you can easily add it by clicking on "All Fields." This action allows you to view all available fields, including those that are not currently selected for display. From this view, you can select the desired field and move it to the "Selected Fields." This process ensures that you can customize your sidebar to show relevant data according to your specific needs, enhancing your ability to perform effective searches and analyses in Splunk.

The other options do not facilitate adding the field to the sidebar correctly. The "Interesting Fields" section generally highlights fields that are deemed more relevant based on statistical data from the current search, so simply clicking this section wouldn't allow you to add fields that are not already highlighted. Similarly, moving a field from "Selected Fields" to "Interesting Fields" does not apply here, as this does not pertain to displaying fields. Lastly, the notion that all fields always appear in the sidebar is inaccurate, as some fields require manual selection to be displayed.