Groups are a good way to organize the objects in your scene. They let you move multiple objects at a time, and each object can be a member of more than one group, so you can organize them whichever way you want:
Open your island file that you just made or the
4909_10_Island_Ocean_Pier.blendfile from the download pack.Select the Pier Railing Path, Pier Railing Shape, Piling, and Piling.001 in the Outliner window with Shift + LMB.
In the 3D View header, select the Object button. Select Group from the pop-up menu and select Create New Group in the second menu.
In the Properties window, select the Object button from the header; it's the button with the cube on it.
In the Groups subpanel, under the button that says Add to Group is a text entry button. Enter
Pier Groupinto that button.Now, look in the header of the Outliner window above the Properties window. There is a button that says All Scenes or Current Scene. Click on it and select Groups...