It might be good to know that Cannell died in 2010 of melanoma, a change of color to the skin. Early additions had Cannell smoking a pipe while typing on the typewriter; which later became discontinued as Cannell no longer smoked his pipe in 1984.
In the early years, we just see Cannell wearing a sweater while the later versions sported him wearing a polo shirt with the collar stuck up. Shows with this logo were The A-Team, 21 Jump Street, The Greatest American Hero, and several other 1980s shows.
On Family Guy,We see Peter typing on a typewriter,then he throws the paper.
We don't know about The Simpsons.
One YouTube variant has someone typing on a typewriter then he throws the paper.The logo is in reverse and the paper hits his face.
1981: Cannell is wearing a dark colored sweater with white collar shirt, plus he is smoking his pipe.
1983: Cannell is wearing a blue jean jacket and white flannel shirt over a black turtleneck, plus he is smoking his pipe.
1984: Cannell is wearing a black jacket and dark colored sweater over white collar shirt, plus he no longer smokes his pipe.
1985: Cannell is wearing a white striped flannel shirt.
1987: Cannell is wearing a casual black and white vest.
1989: Cannell is wearing a vermillion polo shirt, with the collar up.
1996: Cannell is wearing a black sweater.
2004: Cannell is wearing a black jacket with a black sweater.