Format mameinfo.dat / history.dat to fit your window. No more scrolling left / right to view the text.
Enter the width of your display (or the width of the window) that mameinfo / history is displayed in. Enter the path to the .dat file. Your old .dat will be renamed to .dat.old, and a new .dat will be created in the same folder.
If some lines are still too long, you can increase the 'Fudge Factor" to shorten the lines.