I want to attach the pictures of a feature in the web map or ArcGIS online, similar to hyperlink option in ArcGIS desktop, is it possible? if possible, please help me.
Check this out Show Attachments in Web Map Popup
You can also enable attachments from item details page of the hosted feature service in ArcGIS Online.
How to Enable Attachments on Hosted Feature Service
Courtesy: Kelly Gerrow
Then you can Configure pop-ups to show attachments.
This article may help you.
Show Attachments in Web Map Popup
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