Mark the Window Before It Closes
Mission planner Diego learns the Mars Window 2027 go/no-go just moved. The exec briefing starts in twelve minutes.
The crisis
The slide deck shows 2027-08-18. The new go/no-go date is 2027-08-15 — three days earlier. If the gantt doesn't reflect reality before Diego presents, the executive team approves a plan that already missed.
loading framework (core, app)
The save
Diego right-clicks the date header at 2027-08-15. The menu offers 'Add milestone here'. He clicks, types 'Go/No-Go (revised)', and a milestone diamond appears on the date axis.
The outcome
The chart matches reality before Diego stands up. The exec call closes with the right date in everyone's calendar.