Mastering the UI / Cross Hotbar
From the main menu, select System and open the Character Configuration menu, then select the Hotbar Settings tab from the column on the left. Under Cross, you may choose the control type from Cross Hotbar Controls.
Hold
The cross hotbar can only be used while holding either the LT or RT (L2 or R2 on PS5™/PS4™, LT or RT on Xbox Series X|S).
Toggle
The cross hotbar can be toggled on by pressing either the LT or RT (L2 or R2 on PS5™/PS4™, LT or RT on Xbox Series X|S), and toggled off by pressing the same trigger again.
Mixed
Quickly pressing either the LT or RT (L2 or R2 on PS5™/PS4™, LT or RT on Xbox Series X|S) will enable toggle controls, while holding and releasing them will enable hold controls.