Diagrams.net (previously drawio) has shapes for the C4 model of visualising software architecture.
When I initially added a diagram, I couldn’t resize it. But came across a solution via [Google Groups}(https://groups.google.com/g/drawio/c/4D7WfLUajYY)
- Select the shape
Ctrl+e(aka “Edit Style”)
- Look for
- Go to tab “Arrange”. Tick “Constrain proportions”