set flag for follow up for emails did send to a certain people

[Gesen Liu]

1. How can I set flags for follow up for all emails did send to a certain
people in one go? (Or is it possible to set up a rule to do the same thing?)
So I can delete all other emails without a flag and only focus on the email
only me have the visibility.
2. How can I create a keyboard shortcut of setting flag for follow up?
eg. Crtl + Alt +F to flag a email?

 

[Brian Tillman]

1. How can I set flags for follow up for all emails did send to a
certain people in one go? (Or is it possible to set up a rule to do
the same thing?) So I can delete all other emails without a flag and
only focus on the email only me have the visibility.

Group by the flag, then select and drag messages you want flagged to the
appropriate group.

2. How can I create a keyboard shortcut of setting flag for follow up?
eg. Crtl + Alt +F to flag a email?

I don't know that, off-hand.