Make sure that you have all Windows OS updates installed.
Photoshop Brush Thumbnails do not display Pressure Sensitive Characteristics
When viewing the General Brushes presets in Photoshop, the thumbnails do not display correctly because they do not show how Pressure Sensitivity controls brush characteristics.
Make sure that you have the latest device drivers installed for your pressure sensitive device (download the drivers from the manufacturer's website).
Verify that Pressure Sensitive controls have been recognized by Photoshop.
- Go to the Brush Settings panel.
- Go to the Shape Dynamics section.
- Set the Size Jitter Control drop-down list to Pen Pressure.
- No warnings appear.
In the Brush Presets, resize the brush thumbnails using the slider at the bottom of the panel with your pressure sensitive device.
Resizing the thumbnails with the slider cause the thumbnails to be re-rendered at the size selected by the slider and with the available tool inputs.
This issue does not occur on Mac.