How can you define the extent of a map in ArcGIS Pro?

Defining the extent of a map in ArcGIS Pro involves setting the desired scale and geographic boundaries, which allows you to control what area of the geography is displayed. By specifying both the scale and the geographic limits, you can zoom in or out accordingly and focus on a particular region of interest. This capability is essential for creating effective maps that accurately represent the data and meet specific project requirements.

Using predefined templates might help in establishing the overall format and layout of the map, but they do not directly influence the extent itself. Selecting a base map provides the underlying context for your data but does not directly define the geographic area being mapped. Merging multiple layers can combine different datasets into a single view, but it does not necessarily dictate the extent of the map; rather, it affects the data visualized within that extent. Thus, setting the desired scale and geographical boundaries is the most pertinent method for defining the extent effectively in ArcGIS Pro.