diff --git a/docs/literate/tutorials/erp.jl b/docs/literate/tutorials/erp.jl
index cd7cddb1..2491fa57 100644
--- a/docs/literate/tutorials/erp.jl
+++ b/docs/literate/tutorials/erp.jl
@@ -108,7 +108,7 @@ text!(0.98, 0.2, text = "* Confidence\nintervals", align = (:right, :top))
 f
 
 # There are two ways to implement it.
-# First is using `:stderror = true' after `;`.
+# First is using `:stderror = true` after `;`.
 
 results.se_low = results.estimate .- 0.5
 results.se_high = results.estimate .+ 0.15
diff --git a/docs/literate/tutorials/topoplotseries.jl b/docs/literate/tutorials/topoplotseries.jl
index 9c12cb57..410b3073 100644
--- a/docs/literate/tutorials/topoplotseries.jl
+++ b/docs/literate/tutorials/topoplotseries.jl
@@ -25,11 +25,21 @@ nothing #hide
 # `bin_width` - specify the interval between topoplots
 
 bin_width = 80
-plot_topoplotseries(df; bin_width, positions = positions)
+plot_topoplotseries(
+    df;
+    bin_width,
+    positions = positions,
+    axis = (; xlabel = "Time windows [s]"),
+)
 
 # `bin_num` - specify the number of topoplots
 
-plot_topoplotseries(df; bin_num = 5, positions = positions)
+plot_topoplotseries(
+    df;
+    bin_num = 5,
+    positions = positions,
+    axis = (; xlabel = "Time windows [s]"),
+)
 
 # # Categorical and contionous x-values
 # By deafult x-value is `time`, but it could be any contionous (i.g. saccade amplitude) or categorical (any experimental variable) value.
diff --git a/src/plot_butterfly.jl b/src/plot_butterfly.jl
index e26e6625..783a9962 100644
--- a/src/plot_butterfly.jl
+++ b/src/plot_butterfly.jl
@@ -36,7 +36,8 @@ Plot a Butterfly plot.
 - `topo_axis.height::Real = 0.25` \\
     Change the height of inlay topoplot.
 - `mapping = (;)`\\
-    For highlighting specific channels.
+    For highlighting specific channels.\\
+    Example: `mapping = (; color = :highlight))`, where `:highlight` is variable with appopriate mapping.
 
 **Return Value:** `Figure` displaying Butterfly plot.
 
diff --git a/src/plot_topoplotseries.jl b/src/plot_topoplotseries.jl
index 0c75455e..dcdee365 100644
--- a/src/plot_topoplotseries.jl
+++ b/src/plot_topoplotseries.jl
@@ -80,6 +80,7 @@ function plot_topoplotseries!(
     config = PlotConfig(:topoplotseries)
     # overwrite all defaults by user specified values
     config_kwargs!(config; kwargs...)
+
     # resolve columns with data
     config.mapping = resolve_mappings(to_value(data), config.mapping)
     data_copy = deepcopy(to_value(data)) # deepcopy prevents overwriting initial data
@@ -141,12 +142,6 @@ function plot_topoplotseries!(
         colorbar = (; colorrange = colorrange),
     )
 
-    config_kwargs!(
-        config,
-        visual = (; colorrange = colorrange),
-        colorbar = (; colorrange = colorrange),
-    )
-
     ax = Axis(
         f[1, 1];
         (p for p in pairs(config.axis) if p[1] != :xlim_topo && p[1] != :ylim_topo)...,
diff --git a/test/test_toposeries1.jl b/test/test_toposeries1.jl
index cdf981ef..ead15dc4 100644
--- a/test/test_toposeries1.jl
+++ b/test/test_toposeries1.jl
@@ -12,6 +12,10 @@ end
     plot_topoplotseries(df; bin_num = 5, positions = positions)
 end
 
+@testset "toposeries: bin_num" begin
+    plot_topoplotseries(df; bin_num = 5, positions = positions, axis = (; xlabel = "test"))
+end
+
 @testset "toposeries: checking other y value" begin
     df.cont = df.time .* 3
     plot_topoplotseries(df; bin_num = 5, positions = positions, mapping = (; col = :cont))