From the other previews it seems that at 1st level you get a certain number of "class skills." You can choose to be trained in so many of your class skills.
If you multi class, you will have access to more class skills, but that in itself does nothing. However, there is a training feat you can take that will let you become trained in any one class skill. So while multiclassing gives you wider access to trained skills, you would have no more trained skills then a straight class character could have.
If you multi class, you will have access to more class skills, but that in itself does nothing. However, there is a training feat you can take that will let you become trained in any one class skill. So while multiclassing gives you wider access to trained skills, you would have no more trained skills then a straight class character could have.