Click on galaxy-selector Select Items at the top of the history panel
Check all the datasets in your history you would like to include
Click n of N selected and choose Build List of Dataset Pairs
Change the text of unpaired forward to a common selector for the forward reads
Change the text of unpaired reverse to a common selector for the reverse reads
Click Pair these datasets for each valid forward and reverse pair.
Enter a name for your collection
Click Create List to build your collection
Click on the checkmark icon at the top of your history again