Once a query is performed, and you are weeding thru the results and omit a record that you indeed want to keep, is there a way to undo that omit???

Once a record is omitted from a found set, it stays omitted until another find is executed that includes the omitted field. It can be frustrating if your original find results in a lot of records you want to omit, and you omit a wrong one near the end of the manual edit and screw up your found set. What I have learned from the frustration is to include as many omits as I can in the original find request. It sometimes takes a little more thought beforehand, but at least you can repeat it.