| Name | Description | Possible values |
| literal::zero | Generic zero value. Can be used with various types such as algebra::vec, dpoint… | n.a. |
| literal::one | Generic one value. Can be used with various types such as algebra::vec, dpoint… | n.a. |
| literal::origin | Generic value for the origin point on a grid. | n.a. |
| border::thickness | Set the default border thickness of images | [0−UINT_MAX] |
| trace::quiet | Enable trace printing | true/false |
1.7.1