Move your mouse cursor over “Family Tree” and click on “Manage Trees”.
On the page that opens, click on “Export to GEDCOM” on the right side next to the name of the tree you would like to export.
On the next page click “Begin the export”. Please note that contrary to what the page says, photos cannot be included in the exported GEDCOM file.
You will then receive an email with the link to download your GEDCOM file. Save the file to a place on your computer where you will remember the location. (The desktop is a good place to put it if you are unsure.)