Hello,
layouts, themes, masters, handouts, sections, and many other content types are supported when merging the PPTX files.
This is the description of the method:
The merging process preserves all contents without internal/external dependencies: slides, paragraphs, tables, lists, text boxes, shapes...
The merging process also preserves the following contents that include internal/external dependencies:
- styles
- images
- charts
- links
- sections
- audios
- videos
- notes
- comments
- layouts
- handouts
- masters
- themes
If you send some PPTX files to contact[at]phpdocx.com, we'll send the output back after merging them, so you can check the output quality.
Regards.