Possible issue Link.
On the WinEdt interface:
- Open the option window.
- go to option interfaces.
- In the left part, open: Highlighting: Colors, Keywords,...
- Right click on Switches and click on Open. Then check if you have this
If the commands are still not underlined after reset, I suggest you follow the response given the previous Link.
BACKGROUND_COLOR="xclEnvBk" in the section of switches.ini. The rest of the setting from
$$ are for multiline backgrounds. And don't forget to load the script. "