user30462: I see some grey bars in my timeline after a clip that I can also move forwards and backwards. What's their purpose and how do I remove them so I can just have blank space in their place?

user4426: They show you where the rest the unused part of your clip is relative to your timeline.
So if you used the first 5 seconds of a 10 second clip in a 10 second comp, you would see a greyed-out bar form 5-10 seconds in your comp.
You can drag the edges of your clip out to extend it in your timeline.
To remove them you would need to change the duration of the clips you've created.
A useful function in a pre-comp is "Trim Comp to Work Area" which trims your comp to where your Beginning and End markers are.

30462: <p>I see some grey bars in my timeline after a clip that I can also move forwards and backwards. What's their purpose and how do I remove them so I can just have blank space in their place?<a href="https://i.stack.imgur.com/9nHDB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9nHDB.png" alt="cts" /></a></p>
 4426: <p>They show you where the rest the unused part of your clip is relative to your timeline.
So if you used the first 5 seconds of a 10 second clip in a 10 second comp, you would see a greyed-out bar form 5-10 seconds in your comp.
You can drag the edges of your clip out to extend it in your timeline.</p>
<p>To remove them you would need to change the duration of the clips you've created.<br />
A useful function in a pre-comp is &quot;Trim Comp to Work Area&quot; which trims your comp to where your Beginning and End markers are.</p>
