Hi, 

I am new to SolidWorks, and I want to make an STL file of a thin rectangular prism with some spherical holes in it at certain locations. 

Some of the holes should not be completely contained in the prism, so that there are sort of craters on the surface. I would also like to be able to specify the center (x,y,z) of these spheres to place them in certain locations:

Where are the relevant tools for