The Latex code for Hermitian Conjugate is \dagger or ^{\dagger}.
To use the Latex code for Hermitian Conjugate in equations, simply place it after the variable or matrix that you want to denote as the Hermitian Conjugate, e.g. A^{\dagger} or \psi^{\dagger}.
Yes, you can use the Latex code for Hermitian Conjugate in both subscripts and superscripts, for example A_{i}^{\dagger} or \psi_{n}^{\dagger}.
The size of the Hermitian Conjugate symbol can be changed by using the \left and \right commands, e.g. \left(A\right)^{\dagger} or \left|\psi\right|^{\dagger}.
Yes, some Latex editors have a shortcut for the Hermitian Conjugate symbol, usually by pressing Ctrl + D or Command + D on a Mac.