Undergraduate / Spacing, characters, word limit my personal statement? [8]

Hi!

I'm working on filling out an online application to the university I wish to attend next year and I was wondering if I need to double-space my personal statement? I feel unsure because I'm typing it in a provided space as opposed to Microsoft Word or handwriting it. The instruction given says it cannot exceed one typewritten page--am I then to assume that I should double-space it?