If you chose "remove and move all TL clips after removed," there should have been no gaps.

If there are gaps, individual clips can be selected (highlighted) and dragged left or right to close those gaps. Or right-click in the gap area and "remove and move..."

I see no "combine" option - enabled or not - so perhaps I have missed the point.

I just gave this a shot and here is what I found:

If you delete or change the length or time of the sections of a split clip then you can no longer combine them.

Combine only works for me when the split clip is not moved or changed in any way.
You cannot combine other clips that are different sections from each other.

Rob
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I agree with robac showed.
Clip's audio or video that have been split can only be combined if they are not modified. AMD-FX 8350 / 8GB DDR3
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I thought that I was doing it all the time ! Perhaps I am misunderstanding the problem. .
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BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.

Please define what is meant by "combine" in this context.

Borgus1:

My understanding of the "Combine" function is that if you mistakenly split a clip and don't remove any frames, then you can highlight the clips and re-"combine" them. Once you remove any frames, you can no longer combine the split clips, because frames are missing. You can then close the gap, but the clips remain split and you can no longer "combine" them as one.

If I am mistaken, perhaps the more expert contributors can enlighten all of us.

Have a great day.

Regards,
-Phil Windows 10 Pro x64
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Makes sense Phil, but after removing a section of a single clip - leaving a gap - I see no menu (right-click) mention of "combine." Where, if anywhere, does this term appear?

Or how is the "combine" function achieved, assuming no fragments of the clip have been removed?

Perhaps this feature is exclusive to PD12?

Borgus1,

I only know of a couple ways to re-combine a clip that has been split:
1. You can use the UNDO function (Ctrl+Z) or on the top of user interface immediately after splitting.
2. You can drag the original clip to the timeline. (This will undo all edits done to that clip)
3. You can load a previous project file (pds). That was before the split.

4. Produce the project, that will combine everything into one video.

Or you can leave the clip in its current split condition, when you produce the project, you would not know there was ever a split put in the clip. Provided you have not removed any part of the clip at the split.

Splits can be starting and ending points for effects.

Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.

Carl, Thanks for that.

I was thinking that combine meant to drag the clips to where they "touch" so that there is no gap. This would be normally where you can put in a transition or just have a jump from one clip to the next.

Of course number 4 is the best method to "truly combine the clips". .
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BoilerPlate: To posters who ask for help -- it is nice to thank the volunteers who try to answer your questions !
Anything I post unless stated with a reference is my personal opinion.

Thank you everyone!! I use music recording software and i was thinking that way when i posted this question. I have been given the info I need.
Thank you a lot.
Jerry