Are you on MatterControl 2 beta?
I would recommend it as it is easy to drag your part to wherever you want it on the bed. You can find it on the MatterControl download page.
If you want the extruder to heat before the bed you can put this in your start gcode
G28
M104 S[temperature] ; start heating extruder
M190 s[bed_temperature] ; heat and wait for bed
M109 S[temperature] ; heat and wait for extruder
If your printer homes towards the bed you may want the G28 at the end of your start gcode.
You can find the gcode settings here: