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 following values exist:

• LogarithmicBase = 10,
• AnnoFormat = NumericManual,
• AnnoFormatString = "10**{0}"

Then the annotations on the axis are displayed as: power₁₀ where “power” is a superscript.