xpSprite Object tab settings.
For objects to be generated from particles, you must tell the xpSprite object which emitter it will work with.
Drag an emitter object into this field to do that.
Until you have done so, you will not be able to access any of the other settings in the xpSprite object.
Click this button to create a new emitter and add it to the Emitter link field.
If this setting is enabled, a sprite will be generated for each particle as soon as it is created.
If it is disabled, no sprite will be generated for newly-created particles until this box is ticked again, or until sprite generation for a particle is turned on by an action.
This is a convenience function.
If there is an emitter in the Emitter link field, clicking this button will make the following changes to the emitter: