Displaying data via visualizations is often helpful, but it can be much easier to explore data (especially new data) via tables. In Knarr, you can create tables and add both dimensions and measures.
Once you create a table, add a dimension or a measure to it by clicking the "+" button in the properties panel. From there you can add as many dimensions or measures as you'd like.
Edit the table inline by hovering over the column headers. You can drag columns to rearrange them or click columns once to sort them.
For measures, Knarr includes totals at the top, and you can choose how those totals are calculated either inline within the table (click the pencil edit icon) or in the Properties panel.
"Auto" provides the expression default across the dataset and filters, so that would be the same as if you created a KPI with the same measure. Other options allow you to sum the rows, show max/min, and show averages or counts.