All-in-one drawing apparatus

An all-in-one drawing apparatus comprising:

• a rectangular drawing board having opposite ends, said opposite ends being perpendicular to a horizontal axis;
• a flat rectangular ruler disposed horizontally on and co-extensive with said drawing board and having a holding means on each end;
• a vertically disposed flat ruler having an upper surface, a square distal end and a round proximate end, said round proximate end having a pivoting means therein and abutting the horizontally disposed ruler, said vertical flat ruler including a perforated slot for accommodating a point of a pen;
• a contiguous centered strip on the upper surface of said vertical ruler, said strip having a center slot aligned with the perforated slot of the vertical ruler and an opposite proximate end extending beyond said round proximate end of said vertical flat ruler, said proximate end of said strip including a notch;
• a protractor having a measuring scale on its upper surface and having a tongue portion with a perforation, said perforation being in alignment with the pivoting means of said vertical ruler, said protractor further having a foot extension on its lower surface;
• said flat rectangular ruler having a slot for accommodating said foot extension of said protractor;
• and
• a pen holder element slidably engaging said slot of said strip;
• whereby said vertical ruler can measure accurate angles for the pen when in said pen holder to mark on a drawing sheet.