Hi there. There is a plugin command called Open Management Mode. That should open the redecorate menu. Just a word of caution: it will only open if there is a furniture item already placed since, without it, there's nothing to redecorate.
Viewing post in Build & Decorate System for RPG Maker MZ comments
Thanks for sharing. Looks like a missing command in the header. I've fixed it in v1.0.1: https://bitqueststudio.itch.io/build-decorate/devlog/1563948/changelog-v-101.
Thanks for the response but for me their is no plugin command called Open Management Mode