Hey there ashvitha,
To configure a process as a subflow, you can find the subflow properties configuration here. Refer to attached image.
Hope this helps.
I don't find that option Have attached reference in answer section.
Any solutions
Hey ashvitha, following the image i have attached above, hover your mouse over the process name where i circled in red, you will see an edit button. Click edit. Then, you can find the "Subflow Properties" tab where i circled in red too. Hope this clarifies it well.
I din't get subflow properties while using subflow in process builder.
In Joget article i can find this (image2018-8-29 18:8:40.png) whereas in my local i dnt find it