Sections aka Backlog Slices
Divide the backlog into various sections which you can name flexibly. This way you can control the chaos even in challenging projects and easily keep an overview.
Every team member can contribute ideas and suggestions to the backlog. As a product owner you collect them in a separate section to discuss them later with all parties involved. This not only creates transparency but also causes everyone to identify with the product and share a common vision.
Simple Priority Management
Prioritize the backlog over the spatial arrangement of the elements. On top are the currently most important things, below are the things that might become important in the future. Move single cards or whole sections simply by drag & drop.