MendelMax 1.5 Home command?

I have a MendelMax 1.5 with Pronterface and Slicr software. When I do a print, it sends the machine to the wrong 'home' spot before printing. How do I set the home location to right above the print bed? Is that command part of Pronterface or my Gcode?

Home direction and setup is determined by where your home switches are located and the firmware setup.
I have a mendelmax 1.5 and my home switches are located in the following locations.
With printer in front of me.
X axis switch is on left side
Y axis is in front
Z axis is on bottom

Home is with nozzle on left front of print bed.

Firmware is as follows for end stops.

// ENDSTOP SETTINGS:
// Sets direction of endstops when homing; 1=MAX, -1=MIN
#define X_HOME_DIR -1
#define Y_HOME_DIR -1
#define Z_HOME_DIR -1