# Editing spots and links in the BDV views. 

See also the _'Linking spots'_ and _'Manually adding spots and linking them'_ sections in [this tutorial](../partA/manual_editing.md).

| **Action**                                                | **Key**                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **_Adding, deleting and modifying spots._**               |                                                                                                                                                                                                                                                           |
| Add a new spot.                                           | Put the mouse at the desired position and press the `A` key.                                                                                                                                                                                              |
| Move a spot.                                              | Put the mouse inside a spot, press and hold `space`, and move the mouse to the desired position.                                                                                                                                                          |
| Delete a spot.                                            | Put the mouse inside a spot and press `D`.                                                                                                                                                                                                                |
| Change the radius of a spot.                              | Put the mouse inside a spot and press `Q` (make it smaller) or `E` (bigger).<br>Hold `Shift` to make larger changes or `Control` for finer changes.                                                                                                       |
| **_Adding and linking spots_**.                           |                                                                                                                                                                                                                                                           |
| Link one spot to an existing one in the _next_ frame.     | Put the mouse **inside** a source spot, and press and hold `L`.<br>The viewer moves to the next time-point and shows a preview of the link.<br>Release the `L` key in the desired target spot. A link is created from the source spot to the target spot. |
| Link one spot to an existing one in the _previous_ frame. | Same procedure, but press `Shift L`.                                                                                                                                                                                                                      |
| Add and link to a spot in the _next_ frame.               | Put the mouse **inside** a source spot, and press and hold `A`.<br>The viewer moves to the next time-point, creates a spot there and links it to the source spot<p>While holding `A`, move the new spot to the desired location, and release `A`.         |
| Add and link to a spot in the _previous_ frame.           | Same procedure, but press `Shift A`.                                                                                                                                                                                                                      |
| Toggle the auto-linking mode.                             | `Control L`                                                                                                                                                                                                                                               |
| _**Removing links**_.                                     |                                                                                                                                                                                                                                                           |
| Delete a link.                                            | Put the mouse over the link to delete and press `D`.                                                                                                                                                                                                      |
| _**Selection editing**_.                                  |                                                                                                                                                                                                                                                           |
| Add a spot / link to the selection.                       | `Shift click` on a spot or a link to add / remove it to / from the selection.                                                                                                                                                                             |
| Clearing the selection.                                   | Click on an empty place of the image.                                                                                                                                                                                                                     |
| Remove selection content.                                 | `Shift delete`                                                                                                                                                                                                                                            |
| **_Undo / Redo_.**                                        |                                                                                                                                                                                                                                                           |
| Undo / Redo                                               | `Control Z` / `Control Shift Z`                                                                                                                                                                                                                           |