I know a lot of us struggle with construction geometry projection. By default, there is no hotkey and most of my colleagues forgetting to switch the mode simply project the geometry as usual, and then manually they have to change to construction geometry.
I suggest adding an alternative Geometry projection option.
1. Left mouse button - normal projection.
2. Shift + Left mouse button - construction geometry.
Thus, without breaking away from the process, you can project two types of geometry at once by pressing or releasing the shift button.
I hope I explained clearly.🙈
