word spacing in last line using block format

[Renee]

Sometimes, the words in the last line in a block formatted paragraph stretch
across the line. If there are only 6 words in the last line, they are spaced
far apart across to the right margin. Not always, however. This has been
bugging me for years! Help please! Thanks.

 

[Yves Dhondt]

That sounds as if you entered a soft return (shift+enter) at the end of the
paragraph rather than a hard return (enter).

A soft return moves to a new line within the same paragraph and therefore
will stretch your current line if alignment is set to justify.

Yves