Can airline companies ask aircraft company like boeing,airbus to design seats configuration as they want?

yes -
airlines can ask configuration , number of seats -

set seating limitation maximum seating number of passengers -
seating limit function of number , size of exits -
number obtained practical evacuation demonstrations -

example - upper deck of 747-100/200 - maximum occupancy 19 passengers -
because there 1 emergency exit door on rh side of upper deck -

- 747-100/200 have 2 such exits, lh , rh side -
increases maximum upper deck occupancy 29 passengers -
.

can airline companies ask aircraft company boeing,airbus design seats configuration want?like 2-2-2,2-3-2 type?

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