| Value | Meaning |
|---|---|
| COPY1 | Copy the data. |
| MOVE2 | Move the data, i.e. first copy it, then delete it from the source using the DELETE target of the X selection protocol. |
| LINK4 | Add a link to the data. Note that this is only useful if source and destination agree on what it means, and is not supported on all platforms. |
| ASK8 | Ask the user what to do with the data. |
Used in GdkDrop and GdkDrag to indicate the actions that the destination can and should do with the dropped data.