The dynamic components provides the means of observing/manipulating
      components that are hidden in a sub-circuit on a higher level. Example:
      You have placed a led in a circuit named MyNiceCircuit.
      Now you use MyNiceCircuit as sub-circuit in the circuit
      named MyToplevel. Simulating in MyToplevel
      will hide your led, hence you have no means to see if the led in MyNiceCircuit
      is lighting up or not. The dynamic components help here by providing the
      possibility of putting an image of the led on the sub-circuit symbol of MyNiceCircuit.
      To add dynamic components to the sub-circuit symbol of MyNiceCircuit,
      you have first to open the appearance editor
      of the circuit MyNiceCircuit. Than you click on the 
-tool
      icon. A window will open listing all the available dynamic components, and
      you can select which one to show in the appearance of your sub-circuit
      symbol. Note that the dynamic components feature is a recursive property.
      This means that if you have a hierarchical structure, it will show all
      possible dynamic components available down from the current sub-circuit.
Currently following tools support dynamic components:
| LED-tool | |
| RGB-LED-tool | |
| to be completed |