Thanks for this question, which has solved a problem for which I was looking for an answer.
I usually scan via the Printer and Scanner System Preference but it's just started saving to the wrong folder (it was putting my scans in Pictures rather than the specified folder). This was with two different Epson scanners, both quite old.
I hadn't realised that it's possible to scan directly into Preview, so this has solved my problem!
I will now just scan via Preview.
BTW it gave me the overview as soon as I opened the Import window, which is ± identical to the one I usually use, apart from not having to choose a folder for the scan to be saved to.
This will save me so much time in the future!
Thanks again!