# How to check if user is in Classic or LEX in a formula field!

<div id="bkmrk-%3Dif%28%24user.uithemedis"><div><div>`=IF($User.UIThemeDisplayed = "Theme4d","LEX","Classic")`</div></div></div><div id="bkmrk-"></div><div id="bkmrk-%28thanks-%40eloquinn%29"><div><div></div><div>(Thanks @Eloquinn)</div></div></div>