Various options to select text quickly in word document

• Double click to select a word
• Ctrl+click to select a sentence
• Triple click to select a paragraph

To select a line or a line in one paragraph another line at a different area:
Keep cursor at left margin it turns into arrow. Now hold Ctrl button down and click to select the line or any number of line by clicking Ctrl+click
To select complete paragraph:  Double click in the left margin space.


To select text horizontally: 

Place cursor at the point where you want to make selection, hold down Alt key and drag left and down (or right and up)