Select the activity bar on the timeline graph that needs to be centered. If more than one bar needs to be centered, hold down the Shift key as you select the bars. If you would like to select all activity bars, right-click on one bar and select 'Select All'.
Once all desired bars are selected, right-click on one of the activity bars and select 'Align to Grid'.
If following these steps do not align your bars, we will need to troubleshoot further. Please submit a ticket request and an AEC Software Support Representative will contact you.