Eagle Cad: change default drill size list

Simply put, toe and heel are the areas of the solder joint that extend from the front and rear of the lead/pad. Think of a solder pad on your PCB as a piece of paper, and think of your hand as one of the leads coming off an IC package. If you place your hand in the middle of the piece of paper, the "toe" and the "heel" are the distance between the tip of your fingers, and the palm of your hand, to the edges of the paper. That's the extra solder in the joint that extends farther than the actual lead/pad on the IC itself.

Here, they are recommending a specific amount of toe because it will provide mechanical reinforcement for the joint. Since there is no room for a suitable heel, given that this is a castellated package that will sit pretty much flush against the main PCB, the only way to add more solder to the joint is to expand outwards, and thus they recommend to give it some extra toe.

To comply with their recommendations, you'll have to turn off the default stop layer and cream layer for the pads, and draw them by hand. This is as easy as going to the properties for the pads to turn both of those features off, and using the rectangle tool, selected to the tStop and tCream layer, to draw the features.

Based of the picture, it sounds like they recommended a tStop that matches the recommended pad exactly, and a tCream layer that matches the pad exactly except for the edge opposite the package, which would extend out 4 mils further.

EAGLE stores the grid setting within each board file, so when you open any board, you get the grid settings used last time you saved this board.

However, it is possible to configure EAGLE with custom values, which are used whenever you create a new board.
Within the EAGLE installation directory, there is the file scr/eagle.scr, which looks like this:

BRD:
MENU '[designlink22.png] Search and order : Run designlink-order.ulp -general;'\
     '[pcb-service.png] PCB Service : Run pcb-service.ulp;'\
     '[idf-3d.png] Export to IDF 3D format: Run eagleidfexporter.ulp;'\
GRID INCH
GRID 1
;




SCH:
Grid Default;
Change Width 0.006in;
MENU '[designlink22.png] Search and order {\
                                          General : Run designlink-order.ulp -general; |\
                                          Schematic : Run designlink-order.ulp; \
                                          }'\
;

It contains several sections for several windows (my snippet shows only BRD and SCH for board an schematic).
I've added two lines to the BRD section to set the grid unit to inch and step width to 1 and proved that I indeed get a 1" grid for new boards. (EAGLE 7.4.0)
Possible units are:

GRID MM (Millimeter)
GRID MIC (Micrometer)
GRID MM
GRID MIL