TfT and SR window size

I would enjoy if TfT and SR ran on serperate window size options that way I don't have to keep swapping from full to windowed and changing resolution I love playing tft and other games or watching youtube at the same time and it's just a tiny bit of an inconvenience switching to fullscreen Sr as I might miss an invade or callout while switching (I am on quite an old PC so switching sizes takes about 15 to 30 seconds and thats alot of time in league of legends so if that could be added in I think alot of people would appreciate it :)