I presume you're talking about "f", the cyclic reduction factor?
If so, there are two places you can define this:
1) In the input, there is a field next to the "hot allowable" field, labeled "f1", "f2", etc. Instead of specifying "f", you can specify a number of cycles.
2) Alternatively, when setting up your Static Load cases, you can click the [Load Cycles] button to expand the dialog. This will let you define the number of cycles on a "per load case" basis.
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Regards,
Richard Ay - Consultant