Is there any crystal report redesigner which can customize the report runtime or at enduser side to remove a column or change the font or size of heading ?

No, you can do this using styles
https://msdn.microsoft.com/en-us/library/aa288418(v=vs.71).aspx
or templates
http://www.businessobjects.com/global/pdf/products/reporting/crystalreports/cr10_templates.pdf

Besides of that, you could perform (more or less) minor changes to the report at runtime.

I havn't don that myself, but besides of the data itself and the prameters the report object allows changing many report objects like static text, images, formulas, and much more at runtime.

That's not as good as a full blown report editor, but it suits many of the "regular" things to be done when parameters are not good enough ...

Since I have no experience with that beyond the fact that I've seen software doing it, I'd recommend to read the corresponding API doc or having fun fiddling around with report objects on your own ...

If you buy licenses of the full blown Crystal Reports engine, you can have users to edit the files.

What are you trying to do?

Many of the formatting options can be controlled through formulas.

Are you doing this based on the data or who is running the report?
For instance you can change the font size through a formula

If Length(CurrentField) < 50 then
  10
Else
   8

mlmcc

first Thanks to all....

sir, i develop the software in vb 6.0 having data in ms access and sql server 2005, 2008. We provide the reports in crystal report. But our software users/customers wants some small changes to be done himself, like suppose there is a report having product code, product name, product packing, current qty & current value in table format. And user does not want to print current value column at that time. So i want to confirm that, is there any redesigner program which makes changes runtime or at the customer site, he can do it ? Or any other third party designer whose viewer/redesigner can do it.