To improve your reading or just make sure you remember some important points of the reading method, here is the method.
Just in case there are questions on visual documents (pictures, graphs, paintings and goodness knows what else), this 2nd video may be helpful to get an overview of such analyses. Here is a document about the Method used to interpret Graphs or paintings.
Make sure to check your level in reading with this simple test
Now, if this is not enough, here are some links.