With the Attribute Selection, you can apply a selection that selects cases based on specific attributes.
To add an attribute, start with choosing a table from the left side.
You will see all columns of this table. Choose a column to see its content in the center.
Now select a specific value (attribute) from this column. This will be then moved to the top of the column - list.
In our example, we selection for cases that specific activities. As you can see, the right side of the selection has changed, too. Here, you can see the absolute and percentage proportion of the selected cases, compared with all available cases.
Please note, that this number is affected by all active selections, including the (new) selection selection on this page.
After you are done, don't forget to confirm your selection with 
.
Now your selection is set active, and appears in the selection overview.