user31900: How do I replace one layer with another and take all its specifications(size, scale, position, effects....) in after effects?.

user1950: 
Select the layer you want to replace in the timeline or comp window
Alt/opt-drag the new source from the project window into the comp or timeline window.


31900: <p>How do I replace one layer with another and take all its specifications(size, scale, position, effects....) in after effects?.</p>
 1950: <ol>
<li>Select the layer you want to replace in the timeline or comp window</li>
<li><kbd>Alt/opt</kbd>-drag the new source from the project window into the comp or timeline window.</li>
</ol>
