ibooks share menu not show other app
i have iPhone 8 Plus.
i have some PDF file in my ibooks.
i install some apps such as whatsapp , telegram , ...
i want to share my PDF file from ibooks to other app such as whatsapp , telegram , ... ; But when i go to share menu in ibooks ; i see only email icon (see to enclosed file).
other people have a other app icon.
question:
how can i use another icon from the sharing ibooks PDF file?
Best RegardsHojjat Vahidi
iPhone 8 Plus, iOS 11.1, null