What is the difference between hard return and soft return? A hard return is when the user hits the return or enter key to bring subsequent text onto a new line. If you keep typing until the text reaches the end of the line and it star â¦ ts on a new line itself automatically, that is a soft return.
Definition of litmus. 1  1 : a coloring matter from lichens that turns red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator. 2  2 : the critical factor in a litmus test; also : litmus test.
The blue dye has been extracted from lichens since the 16th century. The word litmus comes from the old Norse word for to dye or color. While all litmus paper acts as pH paper, the converse is untrue. It's incorrect to refer to all pH paper as litmus paper. Litmus Test