HUD LAYOUT help suggestion

Apologies if this is in game already and I missed it but I was editing my HUD layout and thought wouldn’t it be great to have a option which gives a live example in every UI box. So for example enemy cast bar rising , seeing two or three debuffs and enhancements etc You can see the size of each UI box but filling it in with a fake live example would help when deciding on readability/ space without having to go into a battle and realising you need to adjust some UI parts.

and boxes for buff/debuff is covering the symbols of buff/debuff, so it's really hard to make it look clean. I hope they adjust the opacity of it