Are you talking about item shortcuts? It's in the options menu, under game settings I think. If it's not there just check each category until you do find it.
Slayer of Demons,Inquisitor,Ylissean Tactician,Kindred Hunter,Gray Warden,Dark Lord,Good Hunter,Chosen Undead,Nerevarine,Exile,Mugunghwa Investigator,Tremere Anarch,ESPer,Squad 7 Hero,Nohrian Prince,Arisen,God Eater,YoRHa Android,Tenno,Hope's Peak Dropout
I found it. It's under Menu Settings. 1st page, 3rd option from the top. You can have between 2 and 4 shortcut sections.
Slayer of Demons,Inquisitor,Ylissean Tactician,Kindred Hunter,Gray Warden,Dark Lord,Good Hunter,Chosen Undead,Nerevarine,Exile,Mugunghwa Investigator,Tremere Anarch,ESPer,Squad 7 Hero,Nohrian Prince,Arisen,God Eater,YoRHa Android,Tenno,Hope's Peak Dropout
I feel like they have missed a trick here. I would prefer, holding up on the dpad, then X, triangle, 0, square for set one. Holding right on the dpad, then x, triange, 0, square for set two. Set three and four, left and down on the dpad. Then you can access anything with just two presses.. it can be a bit of a pain finding the right shortcut selection while in combat