row_2 = row_1 + vertical_space/7; row_4 = row_3 + vertical_space/7; row_3 = row_2 + vertical_space/7; row_7 = row_6 + vertical_space/7; cv_in_1a = [left_col, row_5, 0]; audio_out_1 = [right_col, row_3, 0]; c_tune = [width_mm/2 - h_margin, top_row, 0]; f_tune = [width_mm/2 + h_margin, top_row, 0]; left_rib_x = thickness * 1; right_rib_x = width_mm - thickness; // draw a "vertical" wall to mount the circuit board for extraction A symbol representing annotation for tab placement (condition "A.Type == 'via' && B.Type == A.Type")) # 4-layer condition "A.Type .