Tour : How to quickly add line spacing (single, double or 1.5) in word Office for Businesses #MicrosoftWord Step 1. Simple press Control (plus) 2 Step 2. Remember Control (plus) 5 for 1.5 line space 1. Simple press Control (plus) 2 And this will give double space. Control (plus 1) will give you single space. and control (plus) 5 will give you 1.5 space. try it right now. 2. Remember Control (plus) 5 for 1.5 line space and control (plus) 1 for single line, control (plus) 2 for double line space.