Using this info as a source (http://www.myheritage.com/help/2008/11/how-do-i-add-family-members-to-my-online-tree/en/) and reference.
I am missing the ADD and EDIT and PLUS-sign in tree view. I need to add people - children and spouses online. These are even missing from my name in tree.
I am the site admin, so I should have this right on all individuals, right?
The add/edit and plus sign sometimes disappear when you zoom in too close, or zoom out too far. Try feedling with the zoom lever on the bottom right hand side of the tree and see if it helps.
Also note that pruned araes of the tree (indicated by two small green leafs above the individual's box) do not have these buttons either. Click on the leafs to see the relatives of that individual in order to view the add/edit links.