Draw crosshairs marking the center of a hole. On technical drawings, holes viewed directly are represented by circles. The two lines for the crosshairs must be vertical and horizontal, meeting at 90-degree angles.
Draw a line extending up from the vertical crosshair, but not connecting to it. This line will extend through the circle and then through the nearest external surface line of the object. Draw this line long enough to include all dimensions.
Draw another line extending out from the horizontal crosshair in the same manner as the vertical line. This line will also extend through the circle and then through the nearest external surface line of the object.
Draw a vertical line and horizontal line extending from the nearest corner on the design drawing parallel to the lines extending from the center of the hole. These lines will not connect to the corner and will terminate at the same point the center dimension lines terminate.
Draw a horizontal line outside the object connecting the vertical corner and center dimension lines, then draw arrowheads where this line connects to the vertical dimension lines. Repeat this process for the horizontal dimension lines.
Erase enough of the arrowhead lines to provide enough space for the measurement, then write the measurement using the standard for the drawing and include tolerances if needed. These measurements are the distance of the center of the hole from the nearest corner.
Draw a 60-degree line connecting to the circle and extending off the object, then draw a short horizontal line connected to the end of the 60-degree line. Draw an arrowhead where the 60-degree line connects to the circle.
Write the symbol diameter at the end of the horizontal line. This symbol is a circle with a 60-degree line through it running from the upper right. This symbol will be the same size as the rest of the lettering. Write the diameter measurement of the hole and any tolerances needed.