This article explains how each of the action buttons works in the Basic GCP / MTP Editor in PIX4Dmapper.

The Basic GCP/MTP Editor pop-up has the following 3 sections:

• GCP/MTP Table: The section that allows the user to edit the GCPs/MTPs/Check Points values and status.
• Images: A list with all the images.
• Preview: The section where the GCPs / MTP / Check Points are marked on the image.

And the action buttons:

• GCP/MTP Manager: Closes the Basic GCP / MTP Editor and goes back to the GCP/MTP Manager.
• OK: Confirms the changes.
• Cancel: Does not save the changes and exits the pop-up.
• Help: Opens the Pix4Dmapper help.