You can use drag and drop to move a survey event from one survey to another but only if you have custody of it and it ‘fits’ into the new survey, i.e. its date is within the allowed range for the new survey and its spatial reference is within the bounding box of the new survey, if it has one. It works well if you can see the event you are moving and the survey you are moving it to at the same time but the scrolling doesn’t work very well so it isn’t easy if you have to scroll to find the survey you want to move it to. It shouldn’t be too difficult to develop a batch update to do this. Does anyone have one?

The problem will be if your events contain some observations to go in one survey and some to go in another. In this case you will need to create new events and samples and move some of the observations to those then move the appropriate events. Will this be worth the effort? Reports will pick up observations across surveys unless told to do otherwise. It may be better to just organise all new data better.