You can use Fence to select either objects that are completely within the selection region (window method), or objects that are either within or touched by the selection shape (crossing method). Toggle between the window and crossing selection methods by using the Window/Crossing toggle on the main toolbar.
To select using a fence:
A "rubber-band line" is now attached to the cursor, anchored at the point of release.
A pair of cross hairs appears when you're near enough to click the first point. This creates a closed fence.
Double-clicking creates an open fence, which can select objects only by the crossing method.
To cancel the selection, right-click before you release the mouse.