Once you have created a Saved Leave you are able to use it when applying instead of filling out the whole form from scratch.
Select the Leave icon and click on Saved Leave
Click the drop down arrow to select the saved leave you wish to use
Fill in the required fields and click the "Save & Submit" button to apply.
Mobile App (Within Mobile Browser)
Swipe left of your home screen to navigate to the leave page.
Select Saved Leave button
Select the saved leave you wish to use
Fill in the leave form and click save and submit