Zooming into a Specific Area

Hello

I have three shapefiles loaded in R, say, a line shapefile of faults in New Zealand, the administrative districts of Fiordland (province of New Zealand) and New Zealand earthquakes. I want to zoom into a specific area so that I can select the earthquake points through select.spatial. How do I do zoom into this area? Is there other way where I can select a polygon by clicking and store it in  a vector?