Grouping or combining several entities into one entity or element

In most cad systems it is possible to group several entities into a single entity. For example a rectangle would be the four sides combined. So the rectangle responds as one element. How do I do this???

we support blocks. a block is only an insertion point without interaction with the drawing where the block is inserted.

You may use a layer to roughly achieve the concept of "combining" though.

Larry Blodgett wrote

In most cad systems it is possible to group several entities into a single entity. For example a rectangle would be the four sides combined. So the rectangle responds as one element. How do I do this???