JMP saves all breakpoints and watches until you delete them. Other user-specific settings, such as column widths on the tabs and the Debugger window size, persist between sessions of JMP.
These settings are stored in a file named JMP.jdeb, the location of which is defined in the USER_APPDATA variable:
• Windows: "C:\Users\<username>\AppData\Roaming\JMP\JMP\19\"
• macOS: "/Users/<username>/Library/Application Support/JMP/19/"
As usual, the values of local variables, global variables, and namespaces clear when you close and reopen JMP.
Note: On Windows, the paths differ based on the JMP edition. In JMP Pro, the path refers to “JMPPro”.