I've noticed that the number of task groups that are in the 'Fleet Headquarters' selection gets a bit huge. I don't have the minerals to construct a large fleet but when I do I'm going to set up a military Fleet and a civilian fleet via the OOB bit on the 4th tab in the task group window.
At least then, there will be less task groups to choose from in the pull downs.
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Another thing I have found that is very useful is the task group order 'send message'. I set this for jump ships that are taking a geo survey vessel out into an uncharted system. I join the two fleets, plot the standard transits out to the required location and then do a send message. A little text box appears and I type something like 'Detach Shale 002 here and do the geo survey'.
Once the ship completes the order, the message appears in the events log. It's a handy reminder.
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While I know it would be a total pain in the bottom, I would like a 'are you sure' for the time update. The number of times I click a 30 day instead of opening the events log..... grrrr. I should learn the keyboard shortcuts..