Scans

A calibration produces two artifacts worth keeping: the scanned target (the image you imported to measure) and the correction curve (the mathematical function that results from it). Without an archive, these two artifacts disappear when you close the app — and you lose the raw material that would let you come back to check a measurement, compare two calibrations or resume a session.

The Scans tab of the library keeps everything. Every target you import is saved here. Every curve you generate is associated here with its source target. You can come back at any time — three months later, next year — and find exactly what you had.

#What you see

When you open the library, the Scans tab shows a grid of thumbnails — one per target you've imported. Each thumbnail shows a miniature of the image, its name (typically the original file name or a name you gave it), and the import date.

You can click a thumbnail to reopen it in the Target module: the source target loads, its associated curve is restored, you find the exact state of the previous session. You can re-measure, adjust, regenerate the curve — or simply review without changing anything.

You can delete an entry. You have two deletion options:

• Delete the target only: the source image disappears, but the associated curve stays in the library (still usable, without being able to go back to the original target).
• Delete everything: the image and the curve are erased together.

This distinction lets you free up space by deleting heavy targets (images can weigh several MB) while keeping the compact correction curves (a few KB each).

#Why it matters

For tracking chemistry drift. If you calibrate the same chemistry on the same paper every month, you accumulate a series of dated targets. When you compare the May target to the November one, you physically see whether your chemistry has drifted — the maximum density has dropped, the highlights have shifted. That's a direct visual observation you can't make without the archive.

For resuming an interrupted session. You calibrate in the evening, you don't have time to finish. The next day, you reopen the library, you click on yesterday's target, and you find exactly the state where you stopped.

For passing knowledge between practitioners. If you want to show your method to a colleague or a studio, you can point to your library — each entry is a documented calibration with its target and its curve. More telling than a long verbal description.

#When you don't need it

For throwaway tests. If you import a target just to check a technical detail with no production intent, delete the entry after your check. The library is for long-term memory, not one-off tests.

For Photoshop-only workflows. Once your

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To save space. Targets are the bulkiest items in the library (several MB each). If your device's storage fills up, delete the old targets while keeping the curves — you free up 95% of the space while keeping the essential part.

#Worth remembering

#The test

Import a target, generate a curve, save. Close and reopen the app. Go to the library → Scans tab. Your target should be there with its thumbnail and the right date. Click to reopen it: you should find exactly the screen of the previous session, curve included. Now delete the target only (not the curve) and check that the curve stays accessible in its dedicated tab.