Logarithmic Scale on Log Report

Hello

I am trying to make the scale of a Plot vs. Depth column on a report log user defined.  The logarithmic option for Scale Type in the Main Properties tab presents the data logarithmically, but there is no option to display scale lines.  As a result, I have been superimposing a Lines at Values to serve as the scale lines.  This approach is adequate as long as the scale max and min are static.  I would like to make these user defined, though, so the scale can be adjusted depending on data range.  Thanks for your help!

Ryan