318-The One With the Hypnosis Tape
Introduced this episode is the magna doodle message board, which is stuck to the wall beside the door in Chandler and Joey's apartment. In later episodes it becomes the source of many hidden gags.

319-The One With the Tiny T-Shirt
(If anyone can read what's written on this one, please tell me what it is on my guestbook)

321-The One With a Chick And a Duck
Smiley Face

402-The One With the Cat
The theif leaves the boys a rather cruel message.
"Thanks for all your stuff!"

403-The One with The Cuffs
A big smiley face

407-The One Where Chandler Crosses the Line
"Clean up the duck feathers in the hallway-Treager"

"I Love You Man"

408-The One With Chandler in a Box
Chandler wrote, "I'm sorry, I'm sorry, I'm sorry" over and over.

413-The One With Rachel's Crush
"Have You Seen Our VIEW?"

416-The One With The Fake Party
"Joey eats little v~~~~~
"Emily-Bon Voy See ya!"

417-The One With the Free Porn
"Clean Bathroom"
"Knock, Knock, Who's there? PORN!"

418-The One With Rachel's New Dress
No work sign

419-The One With All The Haste
"What's up, bro?"

420-The One With All the Wedding Dresses
"Get Out!"

422-The One With the Worst Best Man Ever
"Another bites the dust"

504-The One With Phoebe Hates PBS
"Evil Joe"

506-The One With The Yeti

507-The One Where Ross Moves In
"No Girls Allowed"

Smiley Face

508-The One With All The Thanksgiving Flashbacks
Number 327 inside a heart with wings.

509-The One With Ross's Sandwich
Saturns and stars

510-The One With Innapropriate Sister
A palm tree on an island

511-The One With All The Resolutions
A coffee cup

512-The One With Chandler's Work Laugh
"Joey-Call Kim"

514-The One Where Everyone Finds Out
A stick man skiing

515-The One With The Girl Hits Joey
"C.B + M.B. 4EVER" In a heart.

516The One With a Cop
"Joey your agent called"
A target

518-The One Where Rachel Smokes
"Joey, Carol wants you to call her!!"

519-The One Where Ross Cant Flirt
A picture of NYC

520-The One With The Ball
A face

The One With Joey's Big Break
A spaceship

603-The One With Ross's Denial
An island with palm trees on it, a shark in the water, and a man sitting on a boat.

604-The One Where Joey Looses His Insurance
Two fishes