@Bobo76 You will have to change your Windows scaling to change the font size of Pathfinder tree. Doing so will change the scale of everthing though, not just the Pathfinder tree...
There is a way to change it behind the scenes by hacking the registry, but that is not recommended as editing the registry directly can cause the application to fail or your PC to fail to boot, so use at your own risk.
Located in: Computer\HKEY_CURRENT_USER\Software\Siemens\Solid Edge\Version 219\DEBUG
You will need to change the highlighted together to get it to look right. As you increase the font size, the Item Size nneds increased to fit it, and then the spacing needs changed so that they don't run together in the tree.
You need to open the "version 110" folder.