The Mermaid Popup plugin is a convenient addition to Obsidian, allowing you to display diagrams from various formats such as Mermaid, PlantUML, and Graphviz in a zoomable and draggable popup. With this plugin, you can easily view and interact with your diagrams without taking up too much space on the page. The popup is accessible through a customizable hotkey or by clicking an open button at the top of the screen. You can then use your mouse, touch gestures, or UI buttons to zoom in/out, drag the diagram around, and even close it when you're done.