To highlight a word, double-click it; to highlight a line, click once to its left (in the left margin); and to highlight a paragraph, double-click to its left (again, in the margin). Now let’s look at some bigger selections.

To highlight a large area of text, click once at the beginning of the text, hold down Shift, and then click at the end of the text;or, while holding down Shift, use the cursor keys to expand the selection.

To highlight an entire document, place the cursor at the very beginning of the document and press Ctrl-Shift-End; or, with your cursor anywhere, press Ctrl-A.