Can you a make a field madatory based on another field ; such as if check=false then reason_field should be mandatory
You bet. On your reason_field, you can set data validation. The conditions could be check = false and reason_field = blank. This would highlight the reason_field control with red and provide error warnings of your choice.....
I should have mentioned that this browser enabled, so the data validation tells me that this will not work with my setup
odd for some reason it is working.