The problem comes when the icon that it defaults to for printing is a right load, but the only way that envelopes can be loaded is in the center of the tray. I have an HP Colorlaserjet 3600 and an HP Officejet Pro 8600 and both load this way.
A technical definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output.
In mathematics, an implicit definition of a function is a way of using an equation to specify the values of the function. It contrasts with an explicit definition of a function. In this context, the term implicit function can refer to either the equation (i.e. the relation) or the resulting function.