Comment 0 for bug 1439681

http://docs.mirantis.com/openstack/fuel/fuel-master/user-guide.html#changing-pxe-network-parameters-during-installation

Uncomfortable font size
Note
The VirtualBox automated scripts depend on the network configuration in the config.sh file so the virtual Fuel Master Node can connect to the virtual nodes correctly. Do not use Fuel Setup to configure the Admin network interface when using VirtualBox; however, you can view this Fuel Setup screen by modifying the vm_master_ip parameter in the config.sh file.

vm_master_ip

code {
  padding: 2px 4px;
  font-size: 90%;

90% is too small, it should be 100%
You can remove "font-size: 90%;" to let font displayed in 100%