Components can be add to a glyph with the Add Components sheet.
(contextual menu of the Editing Tool)
|typing||will make the possible options smaller|
|arrow keys (up and down)||will move up or down in the selection|
|tab||jumps from 'Starts With' to 'Contains' and back|
|enter||add the component|
|Copy Metrics||will change the metrics of the glyph based on the added component|
Contextual Edit menu with component options