Yamaha CS1D Operating Manual page 539

Each button has the following function.
RECALL
Load the currently selected effect data from the
library list into the internal effect selected in the
EFFECT function.
STORE
Store the effect data of the effect currently selected in
the EFFECT function to the number selected in the
library list. When you click this button, the LIBRARY
STORE popup window will appear, allowing you to
assign a name to the effect data.
Effect data displayed as "READ ONLY" in the
library list is read-only preset data. New effect data
cannot be overwritten onto these locations.
TITLE EDIT
This edits the title of the effect data currently selected
in the library list.
The TITLE EDIT button is valid only if data has
actually been stored in the number selected in the
library list. If a number with no data is selected, the
button text will be gray, and the button cannot be
used.
APPLY EDIT
Store the edited content of the EFFECT LIBRARY
window back into the same library number.
Hint
The APPLY EDIT button is valid only if the data of
the number selected in the library list has been
edited. If un-edited data is selected, and if a number
marked "READ ONLY" is selected, the button text
will be gray, and the button cannot be used.
4 EDIT
If you edit the effect data selected in the library list
(2), this area will indicate "EDIT."
5 EXIT
This button exits the EFFECT LIBRARY window and
returns to the previous screen.
EFFECT LIBRARY
191