I don't get to play with this very often, but in the week I was putting together a montage of stills I'd taken and noted the default duration when dragged onto the timeline is 5 seconds, so not wanting to get lost drinking from the firehose form of answers on the internet, I trudged through them all shortening them to suit my requirement.
There must be a better way comes to mind.
I've since found I can reduce the default size in New Still Image Length, so that could reduce effort.
Although I've been in IT over 25 years, in this context I'd never needed to know that one could use scripting, so that is an option.
Is there another way I've missed? Could I create a group for the ones I want to resize them on the timeline?
I realise I may have been hiding under a rock on this, but would be most grateful for some pointers here.