Hello, In a TexturePack there is a folder called "ui", in which the file "server_form.json" is located. This file defines the usual forms, as they are known from all servers. (Called SimpleForm, CustomForm, ModalForm for FormAPI) I wonder to what extent it is possible to define custom forms in the file and if it is possible to open these forms with the ModalFormRequestPacket. I look forward to a response.