Drop one bomb at a time?

[Stratman59]

Just started flying my first quick bombing runs in a Yak. I have a 250 bomb on each wing, can I drop one at a time? I have a key on the x52 stick to drop bombs but can't see anywhere I can set it to drop one at a time?  

[216th_Lucas_From_Hell]

Most aircraft allow you to select bomb release modes (salvo, pairs or single) but some fighters don't. The Yak-1 specifically can only drop bombs in pairs