I have text selected. If there is also symbol highlighting, the background color overrides Selection and I can't tell that it's selected. Instead of using the Selection background color it uses the Current Line color.
Stated another way, I think Symbol Highlight is not inheriting it's background from the Selection and instead is inheriting from the Current Line.
I hope that makes sense. I find it hard to describe. But I'd be glad to try again if needed.
SlickEdit Pro 2018 (v23.0.0.4 64-bit)
License type: Beta License
License expiration: 2018-10-09 20:00:00
License file: C:\ProgramData\slickedit\23\slickedit.lic
Build Date: August 29, 2018
Emulation: CUA
OS: Windows 10 x64
OS Version: 10.00.0
Memory: 54% Load, 4433MB/8108MB Physical, 7394MB/16300MB Page File, 5582MB/134217727MB Virtual
Shell Information: C:\WINDOWS\system32\cmd.exe /q
Screen Size: 1920 x 1050, 1920 x 1080