BeagleBone CAPE Development Question

I am just starting to develop my first CAPE and am wondering if someone can point me to a source of technical information (i.e. technical drawings or previous designs) that might provide me with some example specs for the physical dimensions of the board? Of particular interest is the spacing and location of the mating connectors for the expansion headers. Thanks!

Did you look in the Systems Reference Manual??

Gerald

Found, thanks.