PathFnder display has very thin white border on text and is difficult to read.
Solution
Click the Application button, Settings -> Options and go to the Helpers page. Under "Show PathFinder in document view", change the "PathFinder appearance" from "Text on White Background" to "Gradient Display".
Notes and References
Hardware/Software Configuration
Platform: INTL64
OS: windows
OS Version: 1064
Product: SOLID_EDGE
Application: ASSEMBLY
Version: V221.0
Function: PATHFINDER
Ref: 001-10161575