Hello, Having recently upgraded to Debian Stetch (and LyX 2.3) I missed the "QT4 - QTconfig" utility which is now deprecated.
I have found a replacement called "qt5ct": https://sourceforge.net/projects/qt5ct/ With this utility, you can have LyX (and other Qt apps.) blend nicely with the look of other apps. Unfortunately, there was no package for Debian Stretch so I had to build one myself. If anyone is interested, or would like more details (instructions, screenshots, feel free to ask. Best regards, -- Daniel CLEMENT
