I\'m aware of opening files in readonly mode from shell using vim -R, but how to open a file from inside vim in a separate tab (:tabe )
vim -R
:tabe
To open a file in read only mode in a new tab, use
tab sview /path/to/file
To open the file in the same pane, (without using a new window or tab), use
view /path/to/file
Note that tab view /path/to/file does not open a new tab.
tab view /path/to/file