Adding images to a document

Adding images to a document

I am trying out Zoho and when adding images to Zoho Writer file there were two options for the file location;
1) Upload
2) URL

Why can you not grab one from your Zoho Documents folder?  Currently you would have to download the image from the documents folder and then upload again creating a second copy on Zoho's servers.  Currently seems a waste of time and server resources..