Toolbars - Anchors
The Anchors toolbar gives you a quick overview of the anchors defined for a glyph. Anchors are used in Mark to Base and Mark to Mark OpenType Layout Features to define where glyphs are stacked onto each other.
When an anchor is in use by a Mark to Base or Mark to Mark lookup it cannot be deleted, and a lock icon () will appear in front of it. To edit an anchor you can drag it in the glyph edit window, click the "Edit" button on the toolwindow toolbar, or double-click on the entry in the list.
Add a new Anchor
Deletes the selected anchor (only available when anchor is not in use)
Edit selected anchor position
Add/Delete/Modify Anchor classes