The following format works for any log base used in C1Chart, if:
• The AnnoFormat property = NumericManual
• The AnnoFormatString property contains "**".
If both of these are true, then the string is output and the log in the logarithmic base is output to {0}.
So if the folllwing values exist:
•LogarithmicBase = 10,
•AnnoFormat = NumericManual,
•AnnoFormatString = "10**{0}"
Then the annotations on the axis are displayed as: power10 where “power” is a superscript.