On some laptops the Pause key is missing from the keyboard, therefore you need to associate the same function to another key.
The Pause function is activated by the exception value 65535.
With this rule in mind, you can associate the exception value 65535 to a key of your choice by using isCOBOL configuration properties.
For example, if you want to use F6 instead of Pause in order to re-enter in debug mode, launch the Debugger as follows
iscrun -d -Discobol.key.f6=exception=65535 MYPROGRAM