STL 3D View takes effects only in 4-axis CNC projects, even if it appears in 3-axis CNC G-code Generator top toolbar.
STL 3D view in 4-axis G-code generator provides a visual representation of the 3D model from an STL file, enabling you to interact with and inspect the model before processing.
To enable/disable it, on top toolbar, click Enable STL 3D View or Disable STL 3D View.
You can use the mouse to inspect the model before processing.
Based on the STL 3D view, you can then adjust the placement face and image density of the model.
Placement Face
On Model panel of the right configuration bar, click drop-down list in Orientation, and set the placement orientation of the model based on your preference.
Image Density
Input a value to set the resolution of the grayscale image generated by the 3D model.