When setting up firing characteristics for an emitter it’s often common to want to replicate those settings across the other emitters handled by the same controller. VariaBULLET2D has an easy way to do this using a cloning procedure.
To demonstrate, change the default values in the [A] first emitter (the one directly under the Controller in the hierachy), [B] setting Shot Speed to 43 and making the Sprite Color lime green.
And [C] back in the controller increase the [D] Emitter Amount to add more emitters to the controller. Then [E] click on the Clone First Emitter To All button and you will find that all emitters now have the same values as the first emitter, though they can be further edited individually to differentiate if required.