How do I draw a circle on a cylinder?

[fudata]

I realized LENGTH in ARC command ('START, CENTER, LENGTH') means chord length not a real length of arc. Sorry guys.

[scwegner]

I realized LENGTH in ARC command ('START, CENTER, LENGTH') means chord length not a real length of arc. Sorry guys.

I missed your exact question but guessing from the thread title, you may also want to look into the imprint option of the solidedit command. Solidedit>>>Body>>>Imprint.