You can use a tool immediately in the drawing area or store it in a palette in the tool palette set. You can add a catalog tool palette or tools in a tool package to the tool palette set.
When working with both the Autodesk Civil 3D workspace and the Content Browser, you may find it helpful to keep the Content Browser window displayed on your screen at all times. To keep the Content Browser window in view while other applications are active, right-click the title bar of the Content Browser, and select Always On Top.