The green text [points every 3 days] at the bottom left of the data input screen indicates that by default the program will calculate points for lines and curves with a 3 day interval. This can be changed to a one day interval by clicking the text. Selecting a one day interval will decrease the speed of the calculations and increase the size of the file on disk. This is a toggle - clicking the text again will return the interval to 3 days. For ordinary purposes it is recommended that you use 3 day intervals. See figure 13a for these options. Figure 13a To the right of the [points every 3 days] option there is a checkbox which will give you the option to draw substyle for flat, non submerged, dials or draw threads for bifilar dials. Checking this option will put the appropriate line(s) in the drawing, and they can be manipulated on the [Settings] screen in layer L_Z. See figure 13b for these options. Figure 13b