How do I fix? - Abobe Acrobat Pro doing double line spacing in text box

I am wanting to edit a text box, but when I press enter to go to the next line it jumps two lines. When this happens in Word you can simply fix by clicking on the single line spacing button. I can not see any task button in Pro that can amend this. It is stoping me doing my work and would appreciate a hand to fix the issue.