When drone flights have been pre-ordered through the MapEO website, the ROI and GCP information is automatically loaded as soon as a drone flight has been selected, and this selection can not be modified by the user.
On the mission map, the ROI will be drawn (purple box) and the location of the GCPs (red dots) will be displayed. Also, the GCP metadata will be displayed on the screen.
Carefully check this information!
In case drone flights have not been pre-ordered or you want to define/use new ROI and GCP files yourself, check the Field Software user manual for more details (section 'Creating a new mission', step2: Selecting the mission data).
Once the ROI and GCP info has been checked, you can continue to add the acquired drone data.