Question for Handrite users

[AC Question]

I've downloaded Handrite on my Galaxy Tab S1 to take notes on my engineering classes, but I can't really figure out how to change the size of my handwriting, when trying to write an equation or sistem with multiple lines it always compacts my writing to something impossible to read. Help please, midterms are coming. hahahha. Right now i'm using Handrite Ver2.18.