After you have selected an area, such as a buffer or a polygon on the map, you can select certain features within that area.
To select features within a buffer or another feature
All features within the previously selected area will have their layers displayed in the layer list. By default, the first layer is selected. If you select one or more additional layers, adding more features, click Refresh to manually update the list.
This will select all features within the highlighted area that are located on the specified layers.