How do i achieve this

i have no idea what its called, but how do i make this?
i want to achieve what the red square is showing

I believe that is a surface tool plugin, let me fetch the link rq

Alr here it is Surface Tool - Studs Are Back! - Roblox

im not asking for the plugin, i have it but i want to achieve that thing where you can select the surfacetype. its like that list, when i looked at the source code i was extremely confused because its made in fusion

You click on the plugin? The button up there

no i want to know how to make that

use PluginMenu to make these kinds of menus

Thx ! I’m kind of confused on the api, could you show me an example of code?