Delete a picture without a keyboard / Touchscreen use

[Filmoni]

Hello,

How can I delete a picture when I use PSU on a touchscreen device, so without a keyboard and a DEL key ?
If nothing has been set up for this, is it possible to add a delete button on the bottom tool bar or when you right-click on the image?

Thank you very much
Mathieu

[wesstl]

You can right click on a small thumbnail image and select delete....at least on my Mac you can.

[Filmoni]

Yes, you are right.
I didn't specify that I meant in viewer or in full screen mode.