أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Hi Vishnu,
The tool used to swtich from normal to negative mood and vice-versa is called the Invert tool as far as i know.
You can find it in Image > Adjustments > Invert
Keyboard shortcut for Mac: command + i
Keyboard shortcut for Windows: control + i
I hope you find this useful.