Whenever i resize a TeraTerm window, the window is cleared. Actually the old contents are scrolled up a number of lines to make them invisible. Most of the time this is not convenient (e.g. your looking at a logfile, notice the lines are too long for the window, make the window a bit wider and suddenly everything is gone).
I suggest the following: after a resize just leave the old contents where it is. If the window has become too wide for the old lines, do nothing. If the window has become too narrow for the old lines, also do nothing. More or less just like it is now, but skip the scrolling up to clear the window.
Possibly make this a configuration item, then everybody is happy.
doda 
Tera Term
Whenever i resize a TeraTerm window, the window is cleared. Actually the old contents are scrolled up a number of lines to make them invisible. Most of the time this is not convenient (e.g. your looking at a logfile, notice the lines are too long for the window, make the window a bit wider and suddenly everything is gone). I suggest the following: after a resize just leave the old contents where it is. If the window has become too wide for the old lines, do nothing. If the window has become too narrow for the old lines, also do nothing. More or less just like it is now, but skip the scrolling up to clear the window. Possibly make this a configuration item, then everybody is happy.