In December I bought a Lenovo laptop because it came highly recommended. Three months later I still have no idea what the blue symbols on many of the keys (especially the function keys) mean. I can find nothing in the online “help” screens that say a word about it. I was just on the phone with a very pleasant help technician who hadn’t the slightest idea what they mean or how to find out. There are also a couple slots on the outside I can’t figure out. If there is an online downloadable manual, I have been unable to find it.
Bottom line: make sure whoever sells you a computer provides a manual.