I hope it supports multiple windows

I often organize notes in multiple whiteboards, such as organizing another whiteboard based on the content of two whiteboards, and need to edit these whiteboards at the same time (cross-domain and cross-project associations). I have multiple monitors, but the software doesn't allow for multiple windows, so I have to keep switching between the whiteboards to edit.
At the same time, noteey can store a large number of PDFs, and when we read PDFs, we usually need to compare several PDFs together. If you can only open a window, will greatly reduce efficiency.