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properties of the symbols

Each symbol contains a number, default type, default value and a comment. When the symbol is being edited, you can set up these properties in File - Options - Document - Symbol

 

Number represents the name of the standard, in which the symbol is defined and the number of the symbol used in this standard. This parameter is optional and may not be specified for all symbols. If specified it is used in the standard: number format, e.g. EN 60617: 04-01-01

The default type stands for the symbol type. R for resistor, C for capacitor, T for transistor, etc. 

The default value defines electric properties of the symbol, e.g. resistance in Ω, capacity in pF, transistor type, etc. This value will be used as the implicit value in the diagram and you can adjust it any time. If the value is not specified, no symbol type and values will be displayed in the diagram.

Comment - here, you can specify a comment. 

Example:

For a resistor you add "R" for the type and "10K" for the value (this is done in the symbol Symbol Editor). When you insert resistors in the Diagram Editor, the first one will be "R1", "10K", the second one "R2", "10K" etc. The symbol types will be numbered automatically. symbol type and value will be displayed in the diagram. You can then adjust the values based on your actual need.

For earthing symbols you select the "earth" type and do not specify any value. When you paste the earth (mass) symbols in the Diagram Editor, the first will be named "Earth1", the second "Earth2", etc. The symbol types will be numbered automatically. Symbol type nor value will not be displayed as the value was not entered.

If you think you might forget to replace the implicit value by the real one, enter "XX", "?", etc.. Otherwise use the most frequently used value in your diagrams.