How to consider sandwich policy only if the leave days include "x" days?

Below is the path from where you can do the same- 

Go to the Time Attend (1) section of the Keka Portal, and click on Leave (2). Then click on the Leave Plans (3) as shown below:

Once you reach the Leave Plans section, select the Leave Plan (1) & leave type (2) for which you want to consider sandwich policy only if the leave days include "x" days

Click on the 3 dots (3) of that leave and click on Settings (4). 

Once you click on Settings, a window will popup where you need to select Leave Application (1)  and click on Sandwich Policy (2)

Once you reach on the 2nd step i.e., tick the check box of If applied leave is adjoining a holiday, the holiday is considered as leave & If applied leave is adjoining weekly off, weekly off is considered as leave and under that, enter the number of leave days, which should not be exceeded, and click Save Changes (3).

By following this, the settings would be saved for the same.