Click Armory Project - Kode Studio to open the bundled integrated development environment. Kode Studio is based on Visual Studio Code and comes preconfigured for Kha-based projects.
Armory project can be launched directly from Kode Studio by pressing F5. Kode Studio contains debug support for Krom and lets you place breakpoints.
When compiling to one of the C++ targets, native project files are generated. This makes it easy to debug and profile Armory projects in Visual Studio or XCode IDE.
For graphics debugging, check out RenderDoc.