I know what you mean, Sam, it took me some time to figure it out. :-)
So far this is what I have found.
You can change the picture size, not sure how to do this yet, :-( and you
can rotate and flip images. To find these commands click on "Upload", which
is the first command in PicFront's menu bar. Then hover your mouse over the
icons that appear, to see what they do.
To delete images, this is what I did........
In PicFront, create a new folder and name it. Drag the images that you want
to delete into this folder and then delete the folder. If you get stuck, let
me know, and I will post detailed instructions for you.
I think this is a fairly new site, there are no instructions or "help"
files, (at least I haven't found any) and their support sucks. I fired off
an email a few days ago, to their support asking how to delete images, and
I'm still waiting, but not holding my breath.