| partid | p, pid, partid | The parent of the added bone | String | |
| partid | p, pid, partid, part | The parent of the added bone | String | |
| subpartid | sp, spid, subpart | The added bone. All child bone of this bone will also be added. | String | |
| subpartid | sp, spid, subpart | The added bone. All child bone of this bone will also be added. | String | |
| prefix | pfx | Prefix of the newly added bones.<br> This is used to distinguish duplicate bones.<br>E.g.`sp=test;pfx=custom_` will add a bone called `custom_test`.<br> This new bone name can be targeted by other mechanics. | String | Empty String |
| prefix | pfx | Prefix of the newly added bones.<br> This is used to distinguish duplicate bones.<br>E.g.`sp=test;pfx=custom_` will add a bone called `custom_test`.<br> This new bone name can be targeted by other mechanics. | String | Empty String |