Help manage >3 signers

[EvilOliverlord]

Brand new to OpenSign. I'm trying to get 8 people to sign a document. However, no matter how I size things, the Recipients window (right side of frame) only shows three recipients. Below that are the Add Recipients button and the Widgets list. I've already added the 8 people to the document, but I can't actually get to them to add signature widgets for them. That is, I can't click on person #4 so that I can add their signature widget. I assume there's an obvious solution, but I can't find a drag handle or other window resizing tool.
Windows 11, Firefox