I couldn't find a user manual or docs for excel. I could only find [this](https://support.office.com/en-us/article/excel-2013-quick-start-guide-4337fe93-0690-47cb-89a1-8424d5fdd886) quick start guide. I'll try to come up with pictures and a gif for the fill handle.    Should I be using `.. image:: abc.gif` to attach gif?