See Retention Time Recomputing principles if needed.

1. Select the User context for which you want to recompute retention time
2. Go to the MS Identifications→Context→Algorithms→Retention Time Recomputing to display settings dialog
3. Change algo settings options (see below) if needed and click the Ok button

On top of the dialog, is displayed the User context to process.

Retention Time Alignment panel

Outliers panel

• Don't take into account outliers: check this box if you want the algorithm to skip final outliers species (based on Grubbs)

Computing Method panel

• Average:
• Median:
• Weighted average (by score)
• Best score per identification + average:
• Best score per identification + median:

Performance panel

• Use memory tuning: if NOT selected, the process will be faster but memory consuming. If selected, the process will be a little bit slower but memory efficient.