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# Search & Match

QualX identifies crystalline phases by comparing the experimental peak list against a reference database and ranking candidates by a Figure of Merit (FOM).

## Menu

Action | Description
--- | ---
Search → Search & Match | Run a full search using current peaks and options
Search → Search & Match Options | Configure FOM weights, Δ2θ, min. FOM
Search → Restraints | Restrict the search to specific elements, space groups, etc.
Search → Manage Databases | Add, remove or switch reference databases

## Results List

After a search, the Results List dock shows ranked candidates with columns:

Column | Description
--- | ---
(colour) | Unique colour assigned to the card
QM | Quality mark of the reference card
ID | Card identifier
Chemical Name | Compound name
Chemical Formula | Chemical formula
Peakpos. | Peak-position component of FOM
Intensity | Intensity component of FOM
Scale | Intensity scale factor
FOM | Total Figure of Merit (higher = better match)
S-Quant. | Semi-quantitative percentage (RIR, if available)

See Search Match and Restraints for details.