Allow a task or milestone to be marked as "locked." so that it doesn't automatically move when other dependent tasks move.
I often have a hard launch date that can't change. When I adjust dates along the way, it's a real pain to have to keep moving the final launch date back to its original position.

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Tony Ciniglio commented
This is a basic feature that most Gantt chart solutions have.
I can't believe this was requested back in 2012 and has not been implemented yet...10yrs waiting on such a simple feature - wow :)
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Anonymous commented
Indeed, it was a particular bad surprise when a milestone moved as I re-arranged some tasks.
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Stanislav Barantsev commented
I agree, please add this!!!
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Anonymous commented
Agreed! Cam here to write the same suggestion.
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Francesco Not commented
This is a must! A lot of projects are planned around fixed delivery or event dates, so missing this feature makes TeamGantt a lot less valuable.
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LC commented
Yes please, really need this feature as deadlines for external vendors are normally hard deadlines.
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Anonymous commented
This is a must, TeamGantt is useful tool, but rearranging complex projects manually is real pain!
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Simon Stockdale commented
I create two milestones for this. One is dependent on its predecessors the other not. The independent one stays on its date and you can see when other task changes have pushed out the dependent one, so you can adjust these to meet your fixed launch date
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Anonymous commented
Seriously, I tried to plan my project for almost 1 year in advanced. It is virtually impossible, because all dependencies are moving like hell. Fixed start/end dates for tasks/milestones are a must.
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Anonymous commented
I can't believe that this feature is still left out! :O
This one is so needed!!!Specially for milestones - I really don't want my milestones to be moved.