In the tab "Tasks" of the Boinc manager, there is the possibility to Suspend a task.
But it would be nice to have a button to force a task to run (also stopping another if needed) or to change the priority of the task to high.
Why?
It happens I have a task that will finish in a few minutes but because of the swapping between tasks it will not be relaunched for a long time. There is a way 'simulate' this and that is to suspend all the other tasks and after that to undo the suspension, but this is a little 'overkill'.