The parameter upload tool enables you to upload one or more autopilot parameters to any number of drones at the same time.
First, you need to define your parameters in the textbox at the top left corner of the dialog window, following the instructions below the window.
When all parameters are defined, press Shift+Enter to push defined parameters to the MANIFEST (right side of the window).
Once you are satisfied with the MANIFEST, press the Next step button to go to the batch parameter upload dialog, which will try to upload all parameters collected in the MANIFEST.
The batch parameter upload dialog is similar to the mission upload dialog, except that there is a < button at the bottom left corner that switches back to the previous parameter upload dialog.