LXQt panel is the panel shipped with Lubuntu and has a menu, a worksspace switcher, a taskbar for listing all of your default programs, a system tray containing applets and a clock.
To use LXQt panel the menu to search for all the different programs documented and chapter 2 and all the other desktop ones you install from the repositories is to the top left by default. If you want to change to another virtual desktop you can use the desktop switcher. Next is a quick launch version with the icon looking like drawer of a file cabinet to launch pcmanfm-qt. The purple circle icon with a white bird as the head launches falkon the default web browser for Lubuntu.
If you have multiple weapons oepn you can switch between them by left clicking on the taskbar on each windows. If you have multiple of the same window open you will be able to left click to open up the group and then select between the two different windows. If you want to close all of a group of multiple windows you can right click the group and click close all.