[Docathon][Add API Legend No.18]add illustration for roll API

python/paddle/tensor/manipulation.py

@@ -1946,6 +1946,14 @@ def roll(
         name(str|None, optional): The default value is None.  Normally there is no need for user to set this property.
                 For more information, please refer to :ref:`api_guide_Name` .
 
+    The image below shows a 2D tensor of shape `[[1,2,3],[4,5,6],[7,8,9]]` transformed into a tensor of different
+    shape through a roll operation. When a global roll (without the `axis` parameter) is applied, the tensor is flattened 
+    into a 1D array, cyclically rolled, and then reshaped to its original form. When rolled along rows (`axis=0`), the 
+    tensor is cyclically rolled along its rows; when rolled along columns (`axis=1`), the tensor is cyclically rolled along 
+    its columns. From the above operations, we can observe the positional changes of each element under different roll operations.
+
+    .. image:: https://githubraw.cdn.bcebos.com/PaddlePaddle/docs/develop/docs/images/api_legend/roll.png
+    :alt: Legend
 
     Returns:
         Tensor, A Tensor with same data type as `x`.