Step 1: In the message compose box, press the Tab key once. Press the Right arrow key until you find the Sticker button, and press Enter. The sticker and meme list opens.
Step 2: To move to the stickers and memes category pane, press Shift+Tab until you hear: “Popular.” To move in the pane, press the Up or Down arrow keys. To select a folder, press Enter. The focus moves to the list of stickers and memes in the category.
Step 3: Press the Left or Right arrow key to move through the list. To select, press Spacebar.
Step 4: Edit the sticker or meme text to your liking, and when you’re done, press the Tab key until you find the Done button, and then press Spacebar.