How to change these button icons in mobile view in snow flat theme? [see screenshot]

Question

I mean these icons sir/mam.

Comments

To be more clear:

I meant how to change those two icons
1- list icon to menu icon like in android material desin.
2- key icon to something else like a lock icon.

fa-icon code is not working.

Answer 1

This is called responsiveness of a theme.

Click on the left icon you will see everything

Comments

Hi Mayuresh. Congratulation on your winning of the blog tool plugin contest.
I understand that its responsive design. I meant how to change those two icons
1- list icon to menu icon like in android material desin.
2- key icon to something else like a lock icon.

fa-icon code is not working.

I hope I am a bit more clear now.