Adjust The Chart Size… Inside the Chart Frame!
There is a secret when it comes to PowerPoint charts (bar charts, line charts, pie charts, etc.) The secret is: charts have two elements for sizing; the overall chart element bounding box (or frame), and inside that the chart bounding box.
Keep the chart’s overall size as is, which can be helpful for alignment on a slide, or when multiple charts are on a slide. Click the chart, then click the data to make the inner bounding box active. Resize and position as needed – within the outer bounding box of course!
The same goes for chart and axis titles and legends. Each is resizable and moveable within the overall chart bounding box.
TIP: use the legend preset location options; top, bottom, left, right to adjust all chart elements positions, then fine tune the legend size and position).
The functionality is there. It is finnicky. And now it is no longer a secret, hidden formatting option!
-The TLC Creative design team