如何在绘图期间打开新的绘图窗口

I am working on a bit of code that creates a plot consisting of multiple individual graphs, one per ID, showing longitudinal data. For visual purposes, I am limiting the number of graphs to 20 per plot using par, but there are more than 20 IDs in the dataset, and therefore I need multiple plots. I am working on a bit of code that creates a pl