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# Peak Search

## Overview

QualX locates peaks in the diffraction pattern and records their 2θ position, intensity and FWHM. These peaks are used as input for the Search & Match.

## Running Peak Search

Pattern → Peaks → Peak Search runs the automatic peak search with the current conditions. Detected peaks appear as vertical markers in the graphic area and are listed in the Peaks dock.

## Peak Search Conditions

Pattern → Peaks → Peak Search Conditions opens the conditions dialog.

Parameter | Description
--- | ---
Min. 2θ / Max. 2θ | Search range
Threshold | Minimum peak height relative to the pattern maximum
Sensitivity | Controls smoothing before peak detection
Max. peaks | Maximum number of peaks to detect
Append | Add new peaks to the existing list instead of replacing it

## Manual editing

- Add peak: View → Selection Mode, then right-click on the pattern
- Delete peak: select a peak marker and press Delete
- Load / Save: Pattern → Peaks → Load Peaks / Save Peaks

Tip

If too many or too few peaks are found, adjust Threshold and Sensitivity in the Peak Search Conditions dialog.