If your model is too large to fit onto the visible part of the canvas, you can use the mouse to drag the parts of the model into view that are currently outside of the window. You can do this either directly on the canvas or in the overview area. The overview area always shows the entire model. If the overview area is currently not shown, see
Showing and hiding the overview.
When you hold down the mouse button for a longer time over a free spot of the canvas, the mouse pointer changes and you can select an area instead (for example, several blocks and attached wires). See also
Selecting blocks and wires.