Below is the link to an 
article, helping you to set up and use a cantilever offset umbrella. These umbrellas are much more convenient than the traditional market umbrella that sticks in the middle of your table. They usually have great features such as crank system – to open and close the umbrella, rotating mechanism – to position the umbrella ideally in relation to the sun, tilting system – to further improve the exposure of the umbrella.
Velago also has information on these side post umbrellas, on the product page and on the F.A.Q. page: https://velagopatiofurniture.ca/Frequently-Asked-Questions-16.html
The article is here:
hmmm good article post. I am looking for lighting in my umbrellas..