Add-On: Duotone Filters
Install & Activate the Add-On
All Add-Ons are installed/activated the same. Click the link below for instructions:
Enable the Duotone Filters from the Slider Settingsback to menu
Use the “Simplify Transitions” option to allow for smoother cross-fades between slides with Duotone filters applied.
Apply a Duotone Filter to your Slide's Main Background Imageback to menu
The Duotone Filters Add-On extends the default Image Filters: