To view the area showing through the mask simply click on the "eye" on the "Blended panorama" layer.  This will make this layer invisible.  Click on the box again to make the layer visible.

Go through the entire image and correct as necessary.  Then save.

Removing unwanted details...  moving subjects.

The same procedures apply as mentioned above.  This is useful for removing anything that moves such as people, cars, animals, etc.

Due to long exposures anything moving will blur.  As you can see from the image below people are blurred.  For something like this I really don't mind having this blur but if you really want to remove them, again,  follow the same steps as above.

Below I chose the two layers to remove the people.

Patching with layers

Sometimes images just don't line up.   There is a solution to force these images to line up.  I use a number of tools to do this   Again the same procedure as above.  The only difference now is you're manually manipulating a layer to line up.

You can download a sample PSD file for practice here - Patching Layers Sample  1.8MB.  Same image as below.

Follow the steps above.  Figure which layer can repair the error by "SHIFT" & clicking on each layer mask. 

Below I chose the zenith image to fix the error.  Notice the red "X" on Image 6's layer mask.  As mentioned above this signifies the layer mask has been disabled. 

Also notice the "box" around the layer mask.  This signifies that the mask is selected and not the image.  THIS IS VERY IMPORTANT.  To select which to work with simply click on either one. 

Notice the lower portion of the the zenith image how it does not line up.  Don't worry about this.

Enable the layer mask again by simply clicking on it.

Next click on the image (layer).

Duplicate the layer.  You can do this two ways.  You can either hit "CTRL+J" or drag the layer to the "Create a new layer" icon at the bottom of the palette.

The reason for duplicating the layer is so that you can delete the layer if you happen to make a mistake and start over again.  Also it'll make editing easier.

Next crop the image.  This is to make manipulating the layer easier.  If you were to manipulate this layer in it's full size you and your computer will have a difficult time.  Unless of course you have a super computer.

Select the rectangular marquee tool and select an area that will be enough to cover the misaligned area.

Now you will need to select the "Inverse" of this layer.  You can either hit "Shift+CTRL+I" or on the toolbar click on "Select" then choose "Inverse".   Then hit the "Delete" key.

You need to select the reverse because you will be deleting the rest of this layer.

Notice what's left over as indicated by the arrow.  Hit "CTRL+D" to deselect.

Now select the brush tool, opacity 100%, white foreground and select the layer mask. 

Again, make sure the layer mask is selected.  Now brush away to reveal the layer beneath.

Below I lowered the opacity of the blended layer to illustrate where I've brushed away the mask.

Here's what it looks like normal.  Notice where the misalignment is now.

Now the fun part.  Make sure the image (layer) is selected.  Select the transform tool "distort" by hitting "CTRL+T", then right click and choose distort or on the toolbar select EDIT > Transform > Distort.

Choose a corner and slowly drag your mouse to match the layer with the layer beneath.  Take your time.  I normally zoom in to have better control.

Done!

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