A folder named 'Overlay' will be at your disposal, you can put your transparent png files there with the following conditions:
It is highly advised to make your overlays with the following resolutions:
And not to go beyond:
The processing speed will depend of the resolution and file size of the photo to print.
A photo with a resolution close to the recommended overlay will be faster to process.
For example:
A photo of 2mb with a resolution of 2880x1920 will take approximately 20s* to process before being printed.
A photo of 8,56 with a resolution of 5760x3840 will take approximately 70s* to process before being printed.
* Processing time to apply the overlay to the photo, the time it takes to transfer the photo between a device and the WPManager is not taken in account.
Tests made internally, results may vary from one environment to another.
It is then important to make your own tests.
If you don't want to print with an overlay anymore, delete the file.
Manually printing a photo from your pc (right click -> print) will be printed without the overlay.
This is due to some missing information when the photo is transferred to the WPManager.