Reproduce steps:
1.On Mercury12b,mozilla1.4(2003/11/11),jre1.4.2_02-b03
2.On terminal,start jgraphpad
3.New a file, select "Text" function button, drag on canvas and input from keyborard.
4.After finish a line you need to start in a new line, it is astonished to find that enter key not work. In other words, you can't switch to next line by enter key. Sometimes pace key may take effect as enter key, but when you change the rectangle's shape, the characters in rectangle will rearrange automatelly. You can't fix their position.