How can I add gridlines to distinguish the weeks in the chart in

Hi Aniko

Thanks for your question - great to hear from you. See if this helps.

Go to the format tab and choose format gridlines then from the dialogue box select Middle tier column (the middle tier of timeline is usually set to show weeks) and pick a line type and colour.

When you click OK you should now have a line for every week - let me know if this produces the kind of thing you are looking for.

Kind regards,
Andrew