EDITING ESSENTIALS / Use non-destructive editing
1 Convert to Smart Object
This technique involves lots of resizing. When we make a pixel-based layer smaller, we’re effectively throwing away pixels, which is a problem if we decide to go larger again. However, if we convert a layer to a Smart Object we can resize as much as we like with no loss in quality.
2 Take a snapshot
In a project like this there are myriad ways to take your montage. With Snapshots, you can save a point in your workflow then go back to it later if you choose, giving yourself several attempts at once. Create a snapshot in the History panel and it’ll appear at the top of the panel.