You can make text boxes on any form larger if you have access to the Component Manager. Open the form you wish to edit by clicking on the EDIT pencil. When the form opens, click on the text box section you wish to enlarge. On the right, under SECTION PROPERTIES, you will see a number defining the HEIGHT of the text box. Increase the number to the size you wish. This can be done in the component manager in two different locations: Evaluation Component Template (left side of component manager) or District Process (right side of component manager).
NOTE: Forms edited in the Evaluation Component Template will remain there and available to add to your district process for use with multiple evaluation types. Edits completed in the District Process only change the form in the evaluation type where the edit occurred.