From the main menu, select System and open the Character Configuration menu, then select the UI Settings tab from the column on the left. Under General, you'll find the Help options, where you can specify how you want action help to be displayed. If you'd prefer your action help to always display in the same location you set on your HUD layout, select Fixed from the dropdown menu.

Selecting the Next to Cursor option from the dropdown menu will display action help by your cursor when an action is highlighted. Furthermore, by selecting the Fixed (Reversed) option, action help will be displayed based on the assigned location on the HUD layout as well as your cursor's location.

Feel free to experiment with your options and choose the one that works best for your adventures!

If you'd prefer to turn off action help, you can uncheck the "Display action help." box.