How to adjust sequence line to 60bp?

I have a rather primitive question

After importing my sequence alignments to either “Geneious” or “BioEdit”, I cannot export them in the same 60pb per line format, does anyone know how to do that to avoid the manual line adjusting?
Alternatively if there is a web-based line width convertor (e.g. 80 to 60 or 100 to 60 or infinite to 60,..) to solve the problem quickly, please let me know