Where Budget › Gantt button

Steps
- Open the budget's Gantt.
- Look at the Float column: working days the item can slip without delaying the finish. Critical items are in red.
- With Critical path on, their bars are painted red.
- Click Critical only to see only those items and their chapters.
Warning
Negative float (bright red) means a deadline or a constraint is not met: check the item.
Site note
Float is also on the item form (Total Float (d) and Critical) and in the item search with the Critical path and Negative float filters.
Finished items stop being critical.