If you use week numbers in your work, you will want to show week numbers on your schedule.
The app supports showing week numbers in the timeline header.

Week numbers are based on ISO 8601. Week 01 is the week with the first Thursday of the year in it.

Week numbers are displayed at zoom levels which group the timeline header by week like below.

Show week number

  1. Open the configuration panel.

  2. Check the Show Week Number setting.

  3. Close the configuration panel by clicking the update button.

  4. Save the Gantt chart.