The 3D45 chooses settings that are optimized for each type of filament. However we understand the need for adjustability. There are two levels of user control of print settings. 1. From the Main screen press FILAMENT > VIEW/EDIT FILAMENT SETTINGS. This will allow you to specify temperatures and speeds. These settings will be remembered for as long as that spool is loaded.2. From the Main screen press TOOLS > SETTINGS > ADV. MODE. Selecting ""PRIORITIZE G-CODE SETTINGS"" will set the printer to always use the print settings included in the print file. This allows you to change parameters in your slicer and have them faithfully used by the printer.