The STL Editor, also called Layout, is where you orient, arrange, and check a model before slicing. To open it, click Layout next to the model.
Moving the camera
Use two fingers on the touchpad, or hold Ctrl or Command and the left mouse button, to rotate the camera. Hold Shift and the left mouse button to pan.
Choosing the printer
Start by selecting the right Printer Type. By default the printer you used last time is selected, so switch it if you are printing on a different one.
My printers shows the printers in your account. You can also pick any of the existing printers, including Industrial, with no limit.
Positioning the model
The first three items on the top menu handle orientation. You can drag the controls next to the model or type values in the right-hand panel.
Move, Rotate, or Scale
Quick orientation options:
On Bed drops the model to Z=0.
Center moves the model to the middle of the bed.
Optimal Rotate picks the angle that gives the best result. With no other models on the plate it also centres the model; with other models it keeps the current position to avoid intersections.
Max Bed Size scales the model to fit inside the build area, whether that means growing or shrinking it. The button appears in the Scale side menu.
3DPrinterOS uses millimetres by default. If your model was designed in inches, open the Scale menu and use the millimetres to inches button.
Display and model settings
The Extras controls cover how the scene is displayed and what you can do to each model.
The display settings let you show the models list, toggle the rulers, toggle the grid, snap to grid, show the build volume cube, and switch to wireframe mode, which shows only the mesh lines.
Each model also has its own settings:
Remove, though you cannot have fewer than one model on the build plate.
Hide the model.
Copy or duplicate a model. Leave the Quantity field empty to fill the whole build plate.
Rename the model.
Extruder Selection for dual-extruder prints.
The top menu adds a few more actions, Mirror X, Y, Z and the Center, Restore, and On bed buttons.
Dual extrusion
To choose the extruder, click the extruder icon in the top menu, then select it on the right side of the menu.
Read more about dual extrusion printing here. On dual-nozzle Bambu printers, the extruder you assign here maps to the Left or Right filament in the Bambu Slicer, which is how you build a multi-colour Cloud slice; see How to Slice a model in the Cloud.
Adding more files
You can add several files to the same project and build plate, choosing them from the projects or files tabs.
Analyzing the model
A built-in geometry analysis checks the first layer, whether you need supports, whether you need infill and the minimum useful rate, and whether the mesh has any holes or intersections.
Saving
Save the prepared model and it goes to your projects. Read more about how files are organised here.
Slicing
The system picks the slicer automatically from the selected printer. For printers supported by Cloud Slicer (discontinued), Slicer 3 (discontinued), and Slicer 5, it uses Slicer 5. Read about slicing in 3DPrinterOS here.