. . . . . Is it possible to have a different timing for each slide? . . . .
For importing images - the default length, 7 seconds, is set on the Program Settings, Options tab you can change this. All images will be imported at the new setting.
If you want to vary the lengths so some are different from the default setting then this can be done:
Individually
Right clicking the image and select View duration - doing this one by one will be time consuming if there are a lot of images (slides).
As a block
Select the first image, hold down the Shift key and select the end image of a block then release the Shift key, then right click and select View duration.
As none contiguous selection
Select the first image, hold down the Ctrl key and select the images required, then release the Ctrl key, then right click and select View duration.
Yes it is possible. Right-click on each slide individually that you want to change the timing for and choose View duration. Adjust the slider or type in the actual length you want to use.
But yes, you do need to do this for any slide you want to NOT be the default length, normally 7 seconds.