Right now the editor settings appear to be global. I have multiple projects, I work with, often with multiple instances of KDevelop open. Some projects follow the Linux kernel formatting of using tabs whereas other projects indent by 4 and only use spaces. It would be nice if this configuration option could be moved from the main KDevelop settings to the project configuration, or to allow the project configuration to override the main settings. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
The Settings=>Editor section comes from KTextEditor, so it might be difficult to move to the project configuration. There is per-project Source Formatter configuration, which overrides the global settings. Did you try configuring that?