1. Rename all the STL files in the format <X.STL> where X is the numerical order (starting from 1) in which you want the layer to be printed. 2. Create a file called <config.txt> - For every STL file, create a row in <config.txt> to specify the corresponding tool index, extrusion multiplier, and tool's initial extrusion offset in the following format: <STL file name>,<Tool Index>,<Extrusion Multiplier>,<Initial Extrusion Offset> Example:2.STL,3,0.0195,8 - At the end of the file, add a row to specify the printer bed's Z-offset (in millimeters) in the following format: offset=<Z value> Example:offset=2.35 3. Click on the 'Browse' button to select all the STL files along with the config file, and then click the 'Upload' button. Download Sample Files