diff --git a/src/TruthTables.jl b/src/TruthTables.jl
index c969904..91d10bb 100644
--- a/src/TruthTables.jl
+++ b/src/TruthTables.jl
@@ -6,6 +6,7 @@ export @truthtable
 export -->, <-->
 export ∧, ∨, ¬
 
+include("showmode.jl")
 include("truthtable.jl")
 include("tables.jl")
 include("macro.jl")
diff --git a/src/showmode.jl b/src/showmode.jl
new file mode 100644
index 0000000..b666428
--- /dev/null
+++ b/src/showmode.jl
@@ -0,0 +1,93 @@
+const SHOW_MODE = Ref(:bool)
+
+"""
+    TruthTables.showmode!(mode::Symbol = :bool)
+
+Changes the way `TruthTable`s are displayed.\\
+The mode argument can be one of these symbols: `:bool` (default), `:bit` or `:letter`.\\
+`:bool` will use the boolean values (`true` and `false`) without formatting.\\
+`:bit` will use `1` and `0` for `true` and `false`, respectively.\\
+`:letter` will use T for `true` and F for `false`.
+
+# Examples
+
+```julia
+julia> using TruthTables
+
+julia> tt = @truthtable p && q
+TruthTable
+┌───────┬───────┬───────┐
+│   p   │   q   │ p ∧ q │
+├───────┼───────┼───────┤
+│ true  │ true  │ true  │
+│ false │ true  │ false │
+│ true  │ false │ false │
+│ false │ false │ false │
+└───────┴───────┴───────┘
+
+
+julia> TruthTables.showmode!(:bit)
+:bit
+
+julia> tt
+TruthTable
+┌───┬───┬───────┐
+│ p │ q │ p ∧ q │
+├───┼───┼───────┤
+│ 1 │ 1 │ 1     │
+│ 0 │ 1 │ 0     │
+│ 1 │ 0 │ 0     │
+│ 0 │ 0 │ 0     │
+└───┴───┴───────┘
+
+
+julia> TruthTables.showmode!(:letter)
+:letter
+
+julia> tt
+TruthTable
+┌───┬───┬───────┐
+│ p │ q │ p ∧ q │
+├───┼───┼───────┤
+│ T │ T │ T     │
+│ F │ T │ F     │
+│ T │ F │ F     │
+│ F │ F │ F     │
+└───┴───┴───────┘
+
+
+julia> TruthTables.showmode!()
+:bool
+
+julia> tt
+TruthTable
+┌───────┬───────┬───────┐
+│   p   │   q   │ p ∧ q │
+├───────┼───────┼───────┤
+│ true  │ true  │ true  │
+│ false │ true  │ false │
+│ true  │ false │ false │
+│ false │ false │ false │
+└───────┴───────┴───────┘
+```
+"""
+function showmode!(mode::Symbol)
+    if mode ∉ (:bool, :bit, :letter)
+        throw(ArgumentError("Invalid show mode, use :bool, :bit or :letter."))
+    end
+    SHOW_MODE[] = mode
+end
+
+showmode!() = (SHOW_MODE[] = :bool)
+
+# formatters
+_bit_formatter(v, i, j) = Int(v)
+_letter_formatter(v, i, j) = v ? "T" : "F"
+
+function getformatter()
+    mode = SHOW_MODE[]
+    mode == :bool && return nothing
+    mode == :bit && return _bit_formatter
+    mode == :letter && return _letter_formatter
+    return nothing
+end
diff --git a/src/truthtable.jl b/src/truthtable.jl
index 6abcd19..d78a68e 100644
--- a/src/truthtable.jl
+++ b/src/truthtable.jl
@@ -10,11 +10,13 @@ function TruthTable(columns::Vector{Vector{Bool}}, colnames::Vector{Symbol})
 end
 
 function Base.show(io::IO, table::TruthTable)
+    formatter = getformatter()
     println(io, "TruthTable")
     pretty_table(io, table, 
         vcrop_mode=:middle, 
         header_alignment=:c, 
         header=table.colnames, 
+        formatters=formatter,
         alignment=:l
     )
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index 5f58074..d42b45d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,7 +1,6 @@
 using Test, Tables
 using TruthTables
 using TruthTables: TruthTable
-using TruthTables: -->, <-->, ∧, ∨, ¬
 
 @testset "TruthTables.jl" begin
     @testset "TruthTable" begin
@@ -72,6 +71,10 @@ using TruthTables: -->, <-->, ∧, ∨, ¬
     end
 
     @testset "TruthTable show" begin
+        # default show mode
+        @test TruthTables.showmode!() == :bool
+        
+        # show mode: :bool
         tt = @truthtable p && (q || r)
         str = """
         TruthTable
@@ -88,9 +91,48 @@ using TruthTables: -->, <-->, ∧, ∨, ¬
         │ false │ false │ false │ false       │
         └───────┴───────┴───────┴─────────────┘
         """
-        
         @test sprint(show, tt) == str
 
+        # show mode: :bit
+        TruthTables.showmode!(:bit)
+        str = """
+        TruthTable
+        ┌───┬───┬───┬─────────────┐
+        │ p │ q │ r │ p ∧ (q ∨ r) │
+        ├───┼───┼───┼─────────────┤
+        │ 1 │ 1 │ 1 │ 1           │
+        │ 0 │ 1 │ 1 │ 0           │
+        │ 1 │ 0 │ 1 │ 1           │
+        │ 0 │ 0 │ 1 │ 0           │
+        │ 1 │ 1 │ 0 │ 1           │
+        │ 0 │ 1 │ 0 │ 0           │
+        │ 1 │ 0 │ 0 │ 0           │
+        │ 0 │ 0 │ 0 │ 0           │
+        └───┴───┴───┴─────────────┘
+        """
+        @test sprint(show, tt) == str
+
+        # show mode: :letter
+        TruthTables.showmode!(:letter)
+        str = """
+        TruthTable
+        ┌───┬───┬───┬─────────────┐
+        │ p │ q │ r │ p ∧ (q ∨ r) │
+        ├───┼───┼───┼─────────────┤
+        │ T │ T │ T │ T           │
+        │ F │ T │ T │ F           │
+        │ T │ F │ T │ T           │
+        │ F │ F │ T │ F           │
+        │ T │ T │ F │ T           │
+        │ F │ T │ F │ F           │
+        │ T │ F │ F │ F           │
+        │ F │ F │ F │ F           │
+        └───┴───┴───┴─────────────┘
+        """
+        @test sprint(show, tt) == str
+
+        # show mode: :bool (default)
+        TruthTables.showmode!()
         tt = @truthtable p && (q || r) full=true
         str = """
         TruthTable
@@ -107,8 +149,62 @@ using TruthTables: -->, <-->, ∧, ∨, ¬
         │ false │ false │ false │ false │ false       │
         └───────┴───────┴───────┴───────┴─────────────┘
         """
-        
         @test sprint(show, tt) == str
+
+        # show mode: :bit
+        TruthTables.showmode!(:bit)
+        str = """
+        TruthTable
+        ┌───┬───┬───┬───────┬─────────────┐
+        │ p │ q │ r │ q ∨ r │ p ∧ (q ∨ r) │
+        ├───┼───┼───┼───────┼─────────────┤
+        │ 1 │ 1 │ 1 │ 1     │ 1           │
+        │ 0 │ 1 │ 1 │ 1     │ 0           │
+        │ 1 │ 0 │ 1 │ 1     │ 1           │
+        │ 0 │ 0 │ 1 │ 1     │ 0           │
+        │ 1 │ 1 │ 0 │ 1     │ 1           │
+        │ 0 │ 1 │ 0 │ 1     │ 0           │
+        │ 1 │ 0 │ 0 │ 0     │ 0           │
+        │ 0 │ 0 │ 0 │ 0     │ 0           │
+        └───┴───┴───┴───────┴─────────────┘
+        """
+        @test sprint(show, tt) == str
+
+        # show mode: :letter
+        TruthTables.showmode!(:letter)
+        str = """
+        TruthTable
+        ┌───┬───┬───┬───────┬─────────────┐
+        │ p │ q │ r │ q ∨ r │ p ∧ (q ∨ r) │
+        ├───┼───┼───┼───────┼─────────────┤
+        │ T │ T │ T │ T     │ T           │
+        │ F │ T │ T │ T     │ F           │
+        │ T │ F │ T │ T     │ T           │
+        │ F │ F │ T │ T     │ F           │
+        │ T │ T │ F │ T     │ T           │
+        │ F │ T │ F │ T     │ F           │
+        │ T │ F │ F │ F     │ F           │
+        │ F │ F │ F │ F     │ F           │
+        └───┴───┴───┴───────┴─────────────┘
+        """
+        @test sprint(show, tt) == str
+
+        # getformatter
+        TruthTables.showmode!(:bit)
+        @test TruthTables.getformatter() === TruthTables._bit_formatter
+        TruthTables.showmode!(:letter)
+        @test TruthTables.getformatter() === TruthTables._letter_formatter
+        TruthTables.showmode!(:bool)
+        @test TruthTables.getformatter() === nothing
+
+        # formatters
+        @test TruthTables._bit_formatter(true, 1, 1) == 1
+        @test TruthTables._bit_formatter(false, 1, 1) == 0
+        @test TruthTables._letter_formatter(true, 1, 1) == "T"
+        @test TruthTables._letter_formatter(false, 1, 1) == "F"
+
+        # throws
+        @test_throws ArgumentError TruthTables.showmode!(:test)
     end
 
     @testset "Logical operators" begin