Open the document and, in the top-right corner, click Share.
Alternatively, from the Documents tab, hover over the document thumbnail, click the More (•••) icon, and click Share.
In the Share dialog, click the Members & Guests tab.
Click Settings, make any changes, and then click Save.
Back in the share dialog, click Copy Link.
Creating public links
Only available for prototypes, public links do not require viewers to be team members. When creating the link, enabling the Require password setting lets you define a password people will then need to enter when viewing the document.