I've been looking around through the java docs but I couldn't find anything that makes a sign appear on the players screen. For example I'm working on ban plugin and I would like it so that the staff member can choose "other" then a sign appears on their screen so they can type a custom reason. Sorry if I posted this in the wrong section. Just check if this could be moved to "Plugin Development" please.
@Darky786 This thread may help you out -> https://www.spigotmc.org/threads/signmenu-open-client-side-sign-editor-menus.249381/