Von: Johan Vromans

- create a new layer
- place a series of dots denoting a route

I often discover after placing a whole lot of dots that I forgot to create the new layer first. Using undo, I go back to the pristine state. I can then redo the history to get the dots back. However, I cannot redo the paints anymore after creating a layer.

Maybe you should change the workflow from painting the dots yourself to creating a path which can then be stroked?

HTH, Michael

El dt 10 de 06 de 2008 a les 09:36 +0200, en/na Johan Vromans va escriure:

Hi,

When on vacation I often do this:

- import an image of a map (download, digital photo) - enhance it until satisfactory
- create a new layer
- place a series of dots denoting a route

I often discover after placing a whole lot of dots that I forgot to create the new layer first. Using undo, I go back to the pristine state. I can then redo the history to get the dots back. However, I cannot redo the paints anymore after creating a layer.

Is there a way to accomplish this?

You can try this:

starting from the drawed image: redo all up to have all dots drawed. select all.
copy
paste as new image
undo up to pristine state before drawing dots but after the enhancements.
select all (you will not be able anymore to redo) copy

in the new image:
duplicate the layer (as this you have a backup of the dots) hide the duplicate
add a new layer
import the pristine state into it -> paste duplicate it and hide the duplicate (you will need later) raise the visible drawed layer to top. set mode in the drawed layer to
divide if the dots are not white or black. else to grain extract.
flat visible layers. (drawed and pristine) color to alpha (white if there was divide or grey if grain extract) if grain extract select by color transparent, invert selection and fill the dots with original color
set the duplicate of pristine layer visible and down it.

Hope this helps Pere

Quoting Johan Vromans :

Still, I'd like to know if it is possible to replay paint history after a layer create.

Not that I'm aware of. You could, however, perform a Copy Visible (this after you have placed your dots and realized your mistake), UNDO until all the dots are removed, duplicate the layer, Paste the copy buffer as a layer, change the layermode of the pasted layer to Difference, and Merge Down. You should end up with a layer of dots above the original map layer.