On iPad, to merge a few PDF documents, follow the steps below:
On iPhone, go to the destination folder > Select > select some files > Merge.
Note: PDF Expert allows merging regular PDF files and regular PDF files with a single PDF form, but it is not possible to combine several PDF files with PDF forms. It’s not possible to merge signed files, as well.
If you would like to merge PDF forms, you can save Flattened copies of PDF forms and merge them.
