If you have a multi-line textbox in a form, you should make the "Enter" key go to the next line in the text box, rather than cause it to hit the OK button.
❌ Figure: Bad example - "Enter" button causes OK button to be pressed instead of going to next line in the multi-line text box
✅ Figure: Good example - "Enter" button goes to the next line in the text box
It can be done by assigning "True" value to AcceptsReturn and Multiline options in properties bar.
Figure: Developer Notes properties details