## Edit/Create set operations

Edit/Create set operations allow sets to be created using a formula or editor or edited in a spreadsheet-like fashion.

- Edit
  - Add
  - Delete
  - Props...
  - Update
- Formula

### Edit

Edit allows altering an existing set or creating a new one. The editor invoked is either the Xbae edit widget (if installed) or an external editor defined by the GR_EDITOR variable. If the choice of the two is available, a radio button will be present to select the desired editor.

#### Xbae Editor

For the internal Xbae editor, the following applies: Values are updated by pressing return or when leaving a cell. Several buttons appear on the widget:

- Add

  Add a point to a set by copying the currently edited cell and appending it directly afterwards

- Delete

  Delete the current point.

- Props...

  Change the format, precision and column widths of the table.

- Update

  Refresh the display. This is useful if the set type changes or the number of points changes.

### Formula

This may only be used to create new sets. See Load & evaluate