diff --git a/src/apis/gradient.jl b/src/apis/gradient.jl
index 70346ea..e75846c 100644
--- a/src/apis/gradient.jl
+++ b/src/apis/gradient.jl
@@ -16,6 +16,7 @@ Bigger values speed up computation at the cost of using more memory.
 - `params::InputParameters{T, N}`: input parameters for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., acoustic variable-density).
 - `matprop::MaterialProperties{T, N}`: material properties for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., Vp only is required for an acoustic constant-density simulation).
 - `shots::Vector{<:Shot{T}}`: a vector whose elements are `Shot` structures. Each shot contains information about both source(s) and receiver(s).
+- `misfit::Vector{<:AbstractMisfit{T}}`: a vector whose elements are misfit structures, i.e., subtypes of `AbstractMisfit`. See, for instance, [`L2Misfit`](@ref) and [`CCTSMisfit`](@ref).
 
 # Keyword arguments
 - `runparams::RunParameters`: a struct containing parameters related to forward calculations. See [`RunParameters`](@ref) for details. In case of a forward simulation, `gradparams` is set to `nothing`.
@@ -64,6 +65,7 @@ Bigger values speed up computation at the cost of using more memory.
 - `wavesim::Union{WaveSimulation{T,N},Vector{<:WaveSimulation{T,N}}}`: input `WaveSimulation` object containing all required information to run the simulation.
 - `matprop::MaterialProperties{T, N}`: material properties for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., Vp only is required for an acoustic constant-density simulation).
 - `shots::Vector{<:Shot{T}}`: a vector whose elements are `Shot` structures. Each shot contains information about both source(s) and receiver(s).
+- `misfit::Vector{<:AbstractMisfit{T}}`: a vector whose elements are misfit structures, i.e., subtypes of `AbstractMisfit`. See, for instance, [`L2Misfit`](@ref) and [`CCTSMisfit`](@ref).
 
 # Keyword arguments
 - `runparams::RunParameters`: a struct containing parameters related to forward calculations. See [`RunParameters`](@ref) for details. In case of a forward simulation, `gradparams` is set to `nothing`.
diff --git a/src/apis/misfit.jl b/src/apis/misfit.jl
index aa7fffd..b4acdde 100644
--- a/src/apis/misfit.jl
+++ b/src/apis/misfit.jl
@@ -9,6 +9,7 @@ Receivers traces are stored in the receivers for each shot.
 - `params::InputParameters{T, N}`: input parameters for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., acoustic variable-density).
 - `matprop::MaterialProperties{T, N}`: material properties for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., Vp only is required for an acoustic constant-density simulation).
 - `shots::Vector{<:Shot{T}}`: a vector whose elements are `Shot` structures. Each shot contains information about both source(s) and receiver(s).
+- `misfit::Vector{<:AbstractMisfit{T}}`: a vector whose elements are misfit structures, i.e., subtypes of `AbstractMisfit`. See, for instance, [`L2Misfit`](@ref) and [`CCTSMisfit`](@ref).
 
 # Keyword arguments
 - `parall::Symbol = :threads`: controls which backend is used for computation:
@@ -52,6 +53,7 @@ Receivers traces are stored in the receivers for each shot. See also [`build_wav
 - `wavesim::Union{WaveSimulation{T,N},Vector{<:WaveSimulation{T,N}}}`: input `WaveSimulation` object containing all required information to run the simulation.
 - `matprop::MaterialProperties{T, N}`: material properties for the simulation, where T represents the data type and N represents the number of dimensions. They vary depending on the simulation kind (e.g., Vp only is required for an acoustic constant-density simulation).
 - `shots::Vector{<:Shot{T}}`: a vector whose elements are `Shot` structures. Each shot contains information about both source(s) and receiver(s).
+- `misfit::Vector{<:AbstractMisfit{T}}`: a vector whose elements are misfit structures, i.e., subtypes of `AbstractMisfit`. See, for instance, [`L2Misfit`](@ref) and [`CCTSMisfit`](@ref).
 
 # Keyword arguments
 - `parall::Symbol = :threads`: controls which backend is used for computation:
diff --git a/src/inversion/misfits/CCTSMisfit.jl b/src/inversion/misfits/CCTSMisfit.jl
index b442978..80145c7 100644
--- a/src/inversion/misfits/CCTSMisfit.jl
+++ b/src/inversion/misfits/CCTSMisfit.jl
@@ -1,3 +1,13 @@
+
+@doc """
+
+$(TYPEDEF)
+
+Cross-correlation time-shift misfit.
+
+$(TYPEDFIELDS)
+
+"""
 struct CCTSMisfit{T, D, OA <: AbstractArray{T, D}} <: AbstractMisfit{T}
     dt::T
     std::T
diff --git a/src/inversion/misfits/L2Misfit.jl b/src/inversion/misfits/L2Misfit.jl
index 3515d0e..986fac2 100644
--- a/src/inversion/misfits/L2Misfit.jl
+++ b/src/inversion/misfits/L2Misfit.jl
@@ -1,4 +1,13 @@
 
+@doc """
+
+$(TYPEDEF)
+
+L2-norm misfit.
+
+$(TYPEDFIELDS)
+
+"""
 struct L2Misfit{T, D, OA <: AbstractArray{T, D}, IM <: AbstractMatrix{T}} <: AbstractMisfit{T}
     observed::OA
     invcov::IM