[Image View] Can't find delete image button in image preview

[Xev]

When in folder, I have selected Image View. In there, I can click on thumbnail and actual full-size image appears with toolbar on top that has buttons for manipulating image, but I don't see buttons for deleting image or selecting it.

Frequently I need to go through folder of pictures and remove duplicates, blurry ones or bad ones. To do that I need to see full-screen version of image, not thumbnail.

Currently I need to click on [More] and select [Enable Checkbox], click on preview of image, go back and click on image, which takes a lot of time.

I am guessing that lack of delete button is so that there is no refresh of folder, but I would have been fine if [Select] button was in preview of image, so that later on I can delete all selected images.

Am I doing something incorrectly? Is there another way to do quickly what I want to do? Or should I post ticket with plea for this select feature?