[Daniel Silva] “I already tried to ctrl+click and drag them but this feature seem to have a max length.”
This feature changes playback rate of the events, and it has it’s boundaries. Namely a speed of 1/4 to 4x.
Since you seem to have still pictures, you should extend all of those on the timeline (separately).
You have more options:
Ungroup them, and simply change all the lengths to a higher value, simply dragging their sides. This works, if you have say 10 pictures.
If you have say hundred, this would be a lot of manual work, so it will be more comfortable to add the stills to the timeline again, but with a longer duration. For this open preferences and on the “Editing” tab look for “New still image length”. This is the default length of a still when you add it to the timeline. Change it to a higher (say the double) value, add your images again, group them, and try the ctrl-drag method again to adjust.
This method works for free.
Also Vegasaur’s Quick properties can do the same, but without readding the images: it can change the length of any number of selected event, and then either close gaps, or “place events” side by side.
There’s one more thing you could do:
Select the time range you want to adjust, but can’t because it’s slowed down o 1/4 already: and do a render to new track. Then on the new track with the new event you can do the ctrl-drag adjust again. I would use this method only as a very last option, if everything other fails.
Best regards
László Kovács