[Chimera-users] Is it possible to undo an action?

[Eric Pettersen]

On Wednesday, June 30, 2004, at 06:59 AM, Lesheng Kong wrote:

> Hi,
> Is it possible to undo an action in Chimera?
> I notice that some actions in Chimera can be undid, such as "undo 
> selection" or "undo move". Can every action be undid in Chimera?
> For example, I colored a selection zone in a different color. But I 
> want to undo this action and recover each atom's previous color.

Hi Lesheng,
	I'm sorry to report that there is no general-purpose undo action in 
Chimera.  For example, if you delete atoms (with 
Actions..Atoms/Bonds..delete or the "delete" command), they are 
permanently gone and can only be "recovered" by reading the original 
structure file back into Chimera.
	My only suggestion here is that if you have put a lot of effort into 
getting a particular look for your structure, that you save a session 
so that you don't have to start from scratch if you make an error.

                         Eric Pettersen
                         UCSF Computer Graphics Lab
                         pett at cgl.ucsf.edu
                         http://www.cgl.ucsf.edu