Question about using an automator to apply pixelmator watermark

I have a 13in Mac Book Pro High Sierra and just purchased 3.7 Pixelmator. I am making an automator to place a watermark in bulk of photos and no matter the size of the watermark text, it comes out small after applying the automator, how can I get it to keep the size I created the text in Pixelmator? I just created a simple watermark with a text layer on top of a transparent background saved as a png file.