Unfortunately, you cannot. All you can do is to try to avoid the situation.
Typical Workarounds
Since a document you own will always open in edit mode, here are some approaches people employ alone or together:
- Immediately switch to
view
mode after opening a document
- Make a copy of the source document and open that
copy
.
- Use an alternate Google account with
view only
permissions to open those docs for reading.
- Download a copy of the document and open that
downloaded
version.
- If the document has public
view only
permissions, open the document in an incognito
tab without logging in.
Takeaway
The basic takeaway is that if user has edit privileges
on a doc, user should never open the original doc
if it is important to preserve the last edited time stamp.