In case you need to store rather big text you may need to use multi-line text edits. Here I would like to share with you example based on Address Line on Customer Form.
Multi line just a property of the text edit so if you just change mode of control in Customization browser you will be able to use enter in control already.
As soon as you publish customization control will add cut angle what you can use to control its size with mouse:
Important to note that if changing of control mode does not remove filed length restrictions, so you also need to make sure that DAC and DB field has enough allowed length to accommodate all lines.
Have a nice development!