of symbols and a marker for each symbol in a line the marker adopts an individual color for each line of symbols whereby the number of marker devices is reduced the setting values of the stitch zigzag and tension controls are indicated on a tape operated by a seam selector knob the tape includes a flap for the marker application_number US 40198489 A description with reference to fig1 the machine includes a zigzag mechanism not shown located in the pillar of the machine body at the upper end of this pillar there is a stitch selector knob 10 used for choosing pattern stitches the stitches that can be produced are shown by symbols 11 on a panel 12 forming a front piece of the machine at each symbol there is a marker 13 in this case a round hole with an index which is moved between the holes at the symbols when the knob 10 rotates the symbols are divided into two lines 14 15 which are separated so that the upper one 14 has one color and the lower one 15 has another color on the shaft of the knob 10 there is also mounted a zigzag control in the form of a knob 16 by which the stitch width is determined this knob is graded with numerals from for example 0 5 in the middle of the panel there is a stitch length control 17 which is also in the form.