# Mappings

The first step is to create bone mappings for the custom skeleton. Right click anywhere in the content browser and under the category Existent choose HandBoneMappings.

<figure><img src="https://lh7-us.googleusercontent.com/6pAC3sEa14Ynbzd3X0nzvlXv_9-8zaQvJ7ShOqv_5UygcEG5dgOSmpebYgIxiGX2cQHEkeH3jcjHDtBRjNN9rqv_ylw5-eywVtiDCqlm-UjFtA1u0TB73zKu7tMiCycADpzuFi2Lk_xEwr67iQTxKg" alt=""><figcaption></figcaption></figure>

Next create a BodyBoneMappings asset.

<figure><img src="https://lh7-us.googleusercontent.com/PT6lSJmcj3fgTFk0DVoHugd5QHjNNXuRN8t77KC0BcCS-387I_DtOKRNPF47gNCUHzn18z94ChDoqMYaiiKhaRvl1cbqr6u4Ww331m3dTPOjs8iPwMLWKgjRc1s0mqw6G_0tPVio6PjV62eOc23MEQ" alt=""><figcaption></figcaption></figure>

Finally create a TrackerMappings asset.

<figure><img src="https://lh7-us.googleusercontent.com/uhRMZPbK6bjobe3RIJx_8hzsNWKMjKmMKFeTsRulbDjAB3ZqoT_0iii5JRJR3oP8lURXIPw5ONYotydFXXV1018HXYBsnHbUbN1proGCsFQVfO90jCLZzCK_gZIk7VydeUnjwSD9XKsnXcwzNs9Ptw" alt=""><figcaption></figcaption></figure>