Problems With Editing

I am having trouble with the editing since I started blogging especially arranging the photo's. I i want to re-arrange the photo's all i can do is dragging it where I want to locate it but it took me years to do it. I can't do it in a manner that i can save time to do posting because the cut and paste doesn't work at all. Even the text I can't copy and paste it. I've tried so many things already like high lighting the text or photo's but still it didn't work on me. I don't know why it's happening, I don't know if it is in my computer settings or the setting I had in my blog.