Creating a Custom Symbol Using a Standard Symbol

PartQuest Portal Subscription: Essential or Professional

With the PartQuest Portal application you can create a custom symbol for a part if the current one does not suit your needs, or if one is not available. You can start your custom symbol by using a predefined standard symbol as your starting point.



  1. Note:

    If you started from the My Symbols page and are editing an existing symbol, skip to step 3.

    In the Choose Symbol dialog box, in the “Choose a standard symbol” section, expand the category of symbols (if it is not expanded) that is similar to the one you want to create.
  2. From the list of common symbol shapes under a category, click a symbol template to use as a starting point for your symbol.

    These symbols are standard sizes and are not customizable. The size automatically adjusts to display text properly.

    The Symbol Creator dialog box opens with the Symbol name and Terminal(Pin) List section in the left pane, and a Symbol Preview in the right pane.


    From the button at the lower-right side of the Terminal(Pin) List section, you can expand (click Expand ) or collapse (click Collapse ) the left pane.

  3. Do any of the following from the Symbol Creator dialog box:

    If you want to...

    Do the following...

    Change the name of the symbol

    The tool applies a standard name to the symbol, such as Digital_Microphone_1.

    1. Click the Edit button to the right of the symbol name.

    2. In the Custom field, enter the new symbol name and then click Ok.

      If the symbol name already exists, the tool suggests an alternative.

    View details about the part associated with the symbol

    If the symbol is associated with a part that has a datasheet, click the datasheet button to view the functional pin names as well as the terminal numbering of the package.

    Add pins to the symbol

    1. In the Terminal(Pin) List, click in the Terminal # column cell.

      If you are editing a symbol associated with a part and the part has a footprint assignment, then a dropdown list of unassigned terminals displays.

    2. Click on a footprint terminal number for this pin.

    3. Repeat the previous steps until you have assigned terminal numbers to all pins.

    Specify a functional name to be used as the pin label

    For a pin in the Terminal(Pin) List, in the User-defined Name column cell, double-click, and then type a functional name to display as the label on the symbol.

    The symbol size changes dynamically to suit the length of pin names inside the body. For example, if you changed Vout to AmplifierOutputPin, the symbol size increases to accommodate the new pin label length.

    Remove or add all optional pins from the symbol (if applicable)

    Click the Disable All or Enable All button.

    The Symbol Creator tool removes or adds optional pins on the symbol.

    Add or subtract an optional pin from the symbol (if applicable)

    Toggle the Disable or Enable button for an optional pin to either disable or enable it.

    At the bottom of the Terminal(Pin) section, the Symbol Creator tool tracks how many pins are currently unassigned in the Unassigned Footprint Terminals area.

    Show a terminal as a No Connect

    At the bottom of the Terminal(Pin) List section, the Symbol Creator tracks how many standard symbol pins are currently unassigned in the Unassigned Footprint Terminals section.

    Click the Add button to the right of the Unassigned Footprint Terminals area to add unassigned pins to the Terminal(Pin) List section.

    Sort Terminal(Pin) List table rows by column

    Click the header of a Terminal(Pin) List table column to sort the table rows by that column. If you click the same column header again, the sort order reverses.

    For example, if you click the Terminal # column header, the Symbol Creator tool sorts the rows by the terminal numbers, low to high. If you click the column header again, the sort order reverses from high to low.


    To exclude disabled pins from the sort and keep those pins at the bottom of the list, toggle the Terminals Sorting button to the Exclude Disabled position.

  4. (Optional) Check whether a yellow exclamation mark () appears beside the image of a part in a list, indicating the pin-to-terminal mapping is incorrect or incomplete.

    Possible errors include:

    • List of terminal(pin) names does not match terminal numbers.

    • Duplicate terminal(pin) numbers used in mapping.

    • Invalid footprint.