It will nearly always be the case that the world is too large to be seen all at once. You can scroll around in two ways. First, if you are in survey mode, and click near any edge of the view, Xconq will put the position you clicked at the center of the view. By clicking in the same place repeatedly, you can "walk" the view in any desired direction.
If you want to go directly to a particular part of the world, use the panner in the bottom right corner of the map window. To use the panner, click and drag the shadowed box inside the panner. The panner is sized to match the map, and the shadowed box is sized to match the view, so you can get a general idea of of where the map is within the world.