If your Resume is getting into two pages: 

1. Try using a different template. Your data will be transferred onto the new template once you click on the new template. 

You can change the template by clicking on the "Select template" button at the bottom left of the preview screen

2. Reduce the font size 

Font size button appears on the top center of the template screen. 

3. Consider removing data that is not relevant to your present/target job