Symbol Properties are provided in the Symbol tab of a symbol’s definition dialog.

The default property of all symbols is Graphic Comment. Graphic Comment is defined as a text field of 4074 characters. Anything that you enter in the Graphic Comment field is displayed as a comment on the diagram workspace, connected to the symbol by a line. The line is only drawn if the graphic comment is a certain distance from the symbol. You may adjust this distance by selecting the symbol and choosing Format, Diagram Format, Notation and adjusting the Line to Remote Text options.

You may also choose to have the graphic comment displayed inside the symbol (select the symbol and choose Format, Symbol Format, Text Position, and toggle off the Place Graphic Comment Outside selection). You may also turn on/off display of the Graphic Comment completely (right‑click on the symbol and choose Display Mode, then toggle off Graphic Comment).