You can find help for using LibreOffice in various ways. Inside the application you can use the help system if installed or find help to resources online.
LibreOffice comes with an extensive Help system. This is the first line of support for using LibreOffice. To display the Help system, press F1 or select LibreOffice Help from the Help menu. If you do not have the offline help installed on your computer, your default browser will open a page on the LibreOffice wiki if you are connected to the Internet.
For quick tips, place the mouse pointer over any of the icons to see a small box ("tooltip") with a brief explanation of the icon’s function.
For a more detailed explanation, select Help > What's This? and hold the pointer over the icon.
To get more details in tooltips enable the Extended Tips Setting. Go to Tools > Options > LibreOffice General and enable Extended Tips.
Questions and answers from the LibreOffice community
User guides, how-tos, and other documentation
Answers to frequently asked questions