@rbdwt09 Here you would use CSS. We currently support Tailwind. Here are some ideas you could try out:
Common Transition Utilities
• transition: Enables transitions for a set of safe properties.
• transition-all: Enables transitions for all animatable properties.
• transition-opacity: Targets opacity changes.
• transition-transform: Targets transform changes (like translating, scaling, etc.).
• Duration and timing can be specified with classes like duration-300, ease-in-out.
Regarding custom CSS, we do not support the ability to write custom css currently so tailwind is the only way to style components in Uesio right now. We do have it in our backlog to make improvements so the overall styling solution so keep an eye out on our Releases · ues-io/uesio for updates along that line.