Custom footprints

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A custom footprint is a footprint that you design - generally because it does not already exist in the footprint library. You can create your own custom footprints and add them to the library. For example, you might need a custom footprint for an exotic connector you plan to use.

To create a custom footprint without using the library:

1. Simply add the appropriate pad layout and other features (e.g. silk screen) to your design.
2. Group the elements together.
3. Cut and paste as needed.

You can also use the footprint wizard for DIP, SIP, SO, BGA, QFP and Tabbed devices.

To create a custom DIP, SIP, SO, BGA, QFP or Tabbed footprint:

1. Review the component manufacturer's drawing of the component, noting the relevant dimensions.
2. Choose File | New footprint, the footprint composer dialog appears.
3. Choose an appropriate footprint type.
4. Enter the footprint parameters and dimensions.
5. Click OK.
6. Finish creating your footprint by following this instruction.

When your footprint is not appropriate for the footprint composer, please follow these steps:

To create a custom footprint manually:

1. Review the component manufacturer's drawing of the component, noting the relevant dimensions.
2. Choose File | New footprint, the footprint composer dialog appears.
3. Choose "Other" in  the footprint type drop-down box.
4. Click OK.
5. Create your footprint by following this instruction.

You can add a custom footprint to the library to allow convenient selection in future designs.

To add your custom footprint to the Component Library

1. In the left toolbar select the Footprint/Component tool.
2. Click Add....
3. Select the file of your footprint.
4. Enter a description for your footprint.
5. Your footprint will appear under the My Footprints branch of the footprint tree.

You can edit a custom footprint you previously added to the library. For example, you might need to make a change after testing a first run of boards.

To change a custom footprint in the library:

1. Edit the original footprint file.
2. In the left toolbar select the Footprint/Component tool.
3. Click Update...
4. Select the original file you edited.
5. Enter a new description for your footprint and click OK.

You can create a new footprint based on an existing footprint.

To create a custom footprint based on an existing footprint:

1. Follow steps 1-4 of the "To create a custom footprint" section above.
   
2. Place the footprint upon which the new footprint will be based.
3. Select the placed footprint, right click to invoke the context menu, and choose "Ungroup".  If "Ungroup" is not available, choose "Convert to Group" and then Ungroup.
4. Continue editing your new footprint  following  the appropriate steps of "To create a custom footprint" above.