It's been two hours staring at that screen (NOT) and I am still
looking for the altitude hold button LOL *I'za along with the 100's of
passengers would have been dead 118 minutes ago looking for that durn
thing.

See the '10000' on the MCP (the linear panel along the length of the
window)
Below that is a knob rotate it left to assign a lower altitude and
right to increase, below this knob is a button which clearly says
'HOLD'
There is also a 'HOLD' button below Heading too which means the
aircraft can retain a set heading or altitude whilst you change to the
next desired, pressing Heading Select will result in the aircraft
turning at a time of your choosing rather than the second you touch
the knob and VS (Vertical Speed) switch will start the aircraft
climbing or descending at a choosen rate when this is pressed too.

Ibby