Cannot extend project timeline to add new clips

trying to add another clip to end of timeline but the project length is too short. can't seem to find a solution that works. tried selecting project - going to modify and changing duration there but that doenst change anything.

I have the vertical white line that shows end of project and the diagnol grey lines beyond that. im not in a compound clip.


MacBook Pro 16″

Posted on Dec 14, 2025 6:27 AM

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Posted on Dec 14, 2025 8:15 AM

Yes, your clips were inside a compound clip.

You did well to make a new project and add the clips there.

With a compound clip, that slashed area is determined by whatever duration the compound had in the project. If you need the extra content of ghe compound to be visible, click the back arrow and return to the project using the compound, and drag the edge of the compound to extend it.

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Question marked as Top-ranking reply

Dec 14, 2025 8:15 AM in response to ODog

Yes, your clips were inside a compound clip.

You did well to make a new project and add the clips there.

With a compound clip, that slashed area is determined by whatever duration the compound had in the project. If you need the extra content of ghe compound to be visible, click the back arrow and return to the project using the compound, and drag the edge of the compound to extend it.

Dec 15, 2025 7:29 AM in response to ODog

ODog wrote:

thank you thank you!!

so what's the difference between double clicking the CC which is what i've been doing and typing in the shortcut shift+commG? your shortcut obviously allows me to add in additional clips which is what i was looking for.


If you double-click the CC you go into its contents and can edit it.

The CC continues to exist and be part of the project where you had it.


If you do Command-Shift-G the CC will not exist anymore, it is "broken apart" into its constituents.


Example:


Here is a project "Example Project" with three clips A, B, C


Selecting A and B, and creating a Compound Clip - see "Example Project" now has TWO clips, the new compound clip, and clip C


If you now were to do Command-Shift-G now, you would get back to where you started - the compound clip would be no more, and

you would again have clips A, B, C at the project level again (exactly the same as the first image above!).



But if instead you double click on the compound clip, you would dive inside the compound, possibly make edits there, but the "Example Project" will still include the compound, and the clip C.


Dec 14, 2025 7:29 AM in response to Luis Sequeira1

i think i made the mistake of taking all my edits/clips on timeline and putting them into compound clip.

when i open the CC and double click i see all my edits.

but i'm still inside CC. GPT chats telling me to back arrow to get out of it but back arrow just shows me CC closed up. not sure if if makes sense or even possible to grab all my clips in the edit mode and paste them into a new timeline?

Cannot extend project timeline to add new clips

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