Thank you for your reply, I've tried to reopen the script with encoding UTF-8 and the content reappear. I tried to choose "save with encoding" UTF-8, but when I reopen the script, the content went blank, and I have to reopen it with encoding UTF-8 again.
In the meantime, I am facing another problem, I open a new R script, type in a few codes or something and tried to save it. When I wrote on the 1 line, saved, the size of the script changes, normal. Second line, saved, the number of the size increased, normal. However when it comes to line 5-7, saved, the size turn back to 0 B ?????? I have no idea what is going on. I am feeling real depressed, I felt that this software is been giving me all kinds of problems since I updated it.
