from Project page: Tools -> Edit Schematic Symbols
-or- from Project page: click op amp icon in top menu bar for Symbol Editor
-or- from Eeschema: Tools -> Symbol Library Editor
Symbol Editor window opens
Create a new symbol: (left-most op amp symbol in top icon bar)
"Select Symbol Library" box opens
select a library from the list - where you want the new symbol to be saved (jaysComponents).
click OK
Symbol Properties box opens
fill out symbol name and other fields as desired.
click OK
Edit symbol:
Field value and field reference labels will appear on top of each other in center of editor.
Position cursor over a piece of text and right-click.
Clarify selection if necessary with left-click in list offered.
Left-click to select “Move”.
Move cursor to drag selected text to new arbitrary position away from center.
Left-click to anchor.
Add border:
“add graphic rectangle to component body” (square icon in right icon bar)
click to locate one corner
drag cursor and double-click to define closing corner
"Rectangle Drawing Properties box opens
select Fill background if desired.
leave line width at default 0
click OK
Add pins:
click pin icon (2nd from top in right-side menu bar)
click anywhere
"Pin Properties" box opens
fill out pin name and orientation, and any other fields desired,
Click OK
Move cursor to drag pin to desired location.
Circle/bubble at end of pin should be positioned outside the component rectangle.
Left-click to anchor.
Edit/Refine the component:
Edit any element of the component symbol by positioning cursor over it, and right-click.
Click Move or Rotate, if desired.
Click Edit to change eg. pin name or number or orientation or any of several other parameters.