How to upload pics manually to OneDrive on iphone?

[Andy2017]

I just downloaded OneDrive app and in Settings, Camera Upload is off since I don't want OneDrive to automatically upload my pics.

In any chat programs, when there's a pic and when I clicked on it, there's an option called Save to Dropbox (since I have dropbox) also.

I don't see the option Save to OneDrive? How do I enable this feature?

Thanks