Editing at full speed

Creating and moving

• Drag on an empty row to create a task spanning the dragged dates, with a live preview before you release. How it works.
• Drag a bar to move the whole task; you get a day-snapped preview as you drag, and the downstream reflow lands the moment you release.
• Drag either edge to resize — start or finish, with the duration recomputed in working days.
• Press Enter in the grid to insert a new task below the current row and keep typing.

Linking

Choose Link on the Gantt header, pick the predecessor and successor, and set the type — FS, SS, FF or SF — with an optional signed lag. You can also add a link from a task's details, which pre-fills whichever end you opened it from. To change or delete one, click its arrow on the chart: type and lag are editable there, and a negative lag is a lead. A link that would close a loop is rejected outright, and nothing is saved. Full walkthrough in the app’s help.

Never getting lost

• Frozen task panel — the name/grid columns stay put while the chart scrolls horizontally, spreadsheet freeze-panes style.
• Sticky date header — the timescale stays visible while you scroll vertically.
• Resizable name column — drag the divider; your width persists.
• Resizable chart height — drag the bottom edge when sharing the screen with the grid.

Editing in the grid

Dates, durations, constraint types, and scheduling mode are all editable in-grid with full validation: an edit that would over-constrain a task is reported with the conflicting pair, never clamped to "something close". Every committed edit triggers a full recompute, and the critical path updates in place.

Undo, redo, and concurrency

Every reversible edit joins the project's undo/redo history. If a teammate edited the plan since you loaded it, your stale edit is refused (not merged silently) and the plan refreshes — optimistic concurrency means nobody's change is ever lost to a race.