How to set conditions for column

[rajesh nag]

Hi,

I have 2 column Q and R i have created List of yes or no for column Q
If i select yes in Q then Column R is mandatory else if i select no not mandatory, Can any one help me on this

[Bob Phillips]

You could approach it the other way more simply. Don't let them input Yes in Q if R is empty. This could be achieved with event code or Data Validation.