So, here we are. It is possible to resize an image uploaded with weebly. I thought it should! There is an orange square in the bottom right corner of the image.

Only problem: when the image is in the blog sidebar and it's "too big", that corner is off the screen...
I tried adding the Twitter sidebar element, but unfortunately I don't know where to specify my username. It says in the "element settings" but I can't get to those. Clicking on the element makes it stick nastily to the mouse.

I sent in a support request, we'll see how that goes.
I just added an image to the sidebar. It seems that weebly doesn't automatically shrink images that you upload. Or maybe it does, but I haven't figured out where?
This is where I stop saying "she" to talk about myself. I have a "real blog", Climb to the Stars, but I like trying out blogging tools and weebly seems fun. If I like it enough, I might even start using it with my clients!