Component Properties

Double-click a placed component (or select it and open its context action) to edit its properties.

Fig. 32 The Properties dialog: description and documentation link at the top, then the reference designator, model, parameters and orientation.

Description and documentation link

At the top of the dialog the symbol’s description is shown in bold, and — when the symbol provides one — a documentation link. The link is taken from the symbol’s data-info metadata and opens in your web browser; it can point to a help page, a datasheet or a model definition.

Reference designator

The refdes is the element’s unique name on the schematic (R1, C3, N1 …). It becomes the element name in the netlist.

Model

Each symbol carries a SLiCAP model name. It is shown for reference and is written into the netlist.

Parameters

The parameter rows are the values you can set for the element — for example a resistor’s value, or a source’s dc and noise. The available parameters come from the symbol itself.

Enter a number (1k, 2.2e-9) or a symbolic expression wrapped in braces, e.g. {R_s} or {1/(2*pi*R*C)}.
Braced expressions are typeset through LaTeX on the canvas (when pdflatex and dvisvgm are available); otherwise they are shown as plain text.

References

Some elements reference another element — for example a current-controlled source (H/F) names the voltage source whose current it senses, and a coupling factor K names the two inductors it couples. These appear as ref rows.

Showing and hiding labels

For each property there are two check-boxes:

Show value — draw a label for this property on the canvas.
Show name — prefix the value with its name (value: 1k instead of 1k). Only available when Show value is on.

Labels you switch on can be dragged to any position around the symbol; a thin dashed leader line connects a label to its component while it is selected.

Orientation

The lower part of the dialog sets:

Rotation — 0°, 90°, 180° or 270°.
Mirror horizontal / vertical — flip the symbol.

Labels stay upright and readable regardless of the symbol’s orientation.