Skype not only helps users share their views and ideas using the standard messaging tools but also helps users share their mood using the animated emoticons. While some users may like to use these animated emoticons, others may want to discontinue using them.
To disable the animated emoticons (used in the IM):
Click on Tools > Options > IM&SMS section > IM Appearance
Uncheck the box next to the "Show emoticons" option.
Validate with the Save button
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