At the moment, no, it's not possible to hide or show various fields. However, I'll be modifying that page soon, and moving the phone number field into the "Edit" screen, which should buy you some real-estate on that page.
Could you possible replace the Phone Number field with a last Login field and completely get rid of the Account Access History Menu? I have to open 2 instances, one of each menu if I want to clean up and disable or delete accounts that haven't been accessed in 30+ days.
It would also be nice t have a feature to auto send an email to people whose accounts have not been accessed in x days to remind them that if they do not log in the account may become subject to deletion.