Jeff didn't want a Sasquatch body nor did he want to be hairless as a baby mouse. Jeff just wanted to be able to shave and for it to be noticed if he didn't. With his goal in mind he finally got to the settings for facial hair only and he was able to go through a swath of settings but kept it pretty simple. After a few more minutes of looking through the settings he found a simplified setting for growth rate/density to be modeled after... and he was able to select himself 15 years in the future.
After doing so he made it so reality would change and everyone would think him growing a beard was normal.
He applied the setting and told the machine to begin. Less than a minute later it beeped that it was done. Jeff rubbed his face and was dismayed that he didn't have any stubble. Thinking the program was a hoax, he turned it off went to the bathroom to confirm what he already knew. Sure enough he didn't have any sign of a beard, and his heart sank.
After dinner, Jeff used the bathroom and noticed there was a can of shaving cream and a razor, which was strange because his father's supplies were in the master bathroom. It had been a few hours since he had used the Chronivac, he cautiously put his hand to his face and felt the sharp hairs beginning to grow in.
Jeff chided himself, growth rate and density wouldn't give him a beard instantly, but he should have something noticeable to look at before school tomorrow morning.