1 | initial version |

Could you please make your question more precise ? The origin is located at the intersection of the axes:

```
sage: graph + arrow2d((-0.4,-0.4),(-0.02,-0.02), color='red')
```

If you want to add a point at the origin, you can do:

```
sage: graph + point2d((0,0), size=50, color='black')
```

2 | No.2 Revision |

Could you please make your question more precise ? The origin is located at the intersection of the axes:

```
sage: graph + arrow2d((-0.4,-0.4),(-0.02,-0.02), color='red')
```

If you want to add a point at the origin, you can do:

```
sage: graph + point2d((0,0), size=50, color='black')
```

**EDIT** as shown as before, you can add graphics together, including the one produced by `text`

:

```
sage: graph + text('o', (-1, -1))
Launched png viewer for Graphics object consisting of 2 graphics primitives
```

Of course, you can adapt:

```
sage: graph + text('0', (-0.1, -0.05), color='black')
Launched png viewer for Graphics object consisting of 2 graphics primitives
```

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