I have imported images into scan on Android. I adjustwanted to some of the cropping but having adjust the cropping I can see no way to save it
Sorry for the delay in response.
As you import the image from gallery to save it as PDF, you get an option to crop on the same window where the Save as PDF option is available.
Click on the Crop icon and adjust the cropping as required. Then click on Save as PDF to convert it to PDF.
Let us know if you have any questions.