The document outlines the 7 steps to construct an isometric drawing: 1) Draw the three axes at 30 degrees, 2) Plot the principal dimensions of Height, Width, and Depth, 3) Draw the outer lines of the object lightly, 4) Add the internal details by analyzing points, 5) Check the accuracy, 6) Trace visible edges with darker lines, 7) Label the drawing. It also lists 4 key points to remember like keeping axes equally spaced at 120 degrees and using light lines initially.