I need to have multiple lines in a text box. When I finish a line, I press Enter to go to the next line, but that closes the text box window. My question simply is: How do I create a text box with several lines of text?
This software doesn't have that functionality. However, you can create a text box for every line that you need. To do that, you just need to make sure that you don't have the text box selected, and go to Objects -> Text Box to create another one, that you can place under the first one.