I used to do a lot of programming with Delphi. The IDE for that included an indicator, in the form of a dark grey vertical line, to indicate the safe width to use if the code was to be printed at any time. I think this would be a nice feature in B4A (and B4J) because there are times when I want to print the code. I believe the appropriate width is about 70 characters wide for the actual code to allow for the normal right margin as well as the line numbers.