In the dataset view, you can view the datasets in the three different view types UPR, LCI and LCIA. In all view types, at the top of the dataset display you will see 2 buttons.
One is labelled Go to Undefined UPR and lets you view the corresponding dataset in the undefined view, i.e. before linking and allocation.
The other is labelled Add item to basket and allows you to add the dataset to your download basket. In allocation-based system models, the UPR datasets will additionally display a button labelled Show Pre Allocation Dataset.
This button allows you to see the dataset after linking but before allocation. Below, you will see a "Link to:" line, where you can directly jump to different sections of the dataset.