to highlight selected text with a keyboard command?

Is there a way to highlight selected text with a keyboard command, not using the mouse to select highlight in the upper menu?  There was some information that they keyboard command is ctrl + shift + h, but that didn't work for me so far.  When I right-click on selected text, the pop-up menu shows highlight as a selectable option, and in the pop-up menu, the 'h' in the 'highlight' option is underlined.  Is there some combination of keyboard buttons with the 'h' key that allows for highlighting selected text?