He means Operation Frames (or "Raid" Frames in other games) which are usually only used when you turn a party into an operations group. There's an option in the preferences so you can have a regular 4 man party use the Operations frames thus allowing you to customise their placement and size, making it easier for healers to do their thing...
I use them myself despite being a healer because it allows me to keep better tabs on the status of the other players in my party and who is taking damage so I can immediately take the threat off of them when playing as my vanguard.
Here's a screenshot to show you what I mean... don't mind the other stuff happening in it...
...I have the frame size set to MAXIMUM but you can adjust the size and the positioning to your liking very easily.