Start_Level Keyword
Used With Routines:  PLOT
Corresponding System Variable:  !PDT.Start_Level
Specifies the initial level of tick labels to be displayed on a Date/Time axis. The subsequent levels depend on the data range and the first level selected. Use the following index values for the Start_Level keyword:
*7—Year
*6—Quarter
*5—Month
*4—Week
*3—Day
*2—Hour
*1—Minute
*0—Second
*–1—Auto-level