diff --git a/src/main.rs b/src/main.rs
index af01dad..0b40dfb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -22,7 +22,7 @@ fn main() -> Result<()> {
     let formatted = format(
         &input,
         app.line_width,
-        app.hanging_config,
+        app.hanging_config(),
         &paragraph_starts,
     );
 
@@ -94,12 +94,14 @@ struct App {
     #[arg(
         short = 'p',
         long,
-        default_value_t,
         value_enum,
-        help = r#"Treatment for hanging paragraphs.
-If not set, any change indentation changes start a new paragraph."#
+        help = r#"Treatment for hanging paragraphs:
+`disallow` causes any indentation changes to start a new paragraph (default);
+`flatten` ignores any indentation changes;
+`hang` allows the second line to start hanging (having more indentation).
+"#
     )]
-    hanging_config: Hanging,
+    hanging_config: Option<Hanging>,
 
     #[arg(
         short,
@@ -127,4 +129,17 @@ impl App {
         ParagraphStarts::preset(self.markdown_friendly, self.latex_friendly)
             .context("Failed to build special paragraph starts handler.")
     }
+
+    fn hanging_config(&self) -> Hanging {
+        match (
+            self.hanging_config,
+            self.markdown_friendly,
+            self.latex_friendly,
+        ) {
+            (Some(config), _, _) => config,
+            (_, true, _) => Hanging::Hang,
+            (_, _, true) => Hanging::Flatten,
+            _ => Hanging::Disallow,
+        }
+    }
 }
diff --git a/src/tests/format.rs b/src/tests/format.rs
index ddeab3b..01c3759 100644
--- a/src/tests/format.rs
+++ b/src/tests/format.rs
@@ -5,7 +5,7 @@ fn default_format(text: &str) -> String {
 }
 
 fn markdown_format(text: &str) -> String {
-    format(text, 80, Hanging::Flatten, &markdown_paragraph_starts()).join("")
+    format(text, 80, Hanging::Hang, &markdown_paragraph_starts()).join("")
 }
 
 fn latex_format(text: &str) -> String {
diff --git a/src/tests/snapshots/fmtt__tests__format__bracket-2.snap b/src/tests/snapshots/fmtt__tests__format__bracket-2.snap
index ac26439..cecefd9 100644
--- a/src/tests/snapshots/fmtt__tests__format__bracket-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__bracket-2.snap
@@ -3,7 +3,8 @@ source: src/tests/format.rs
 expression: "&markdown_formatted"
 ---
 \begin{figure}
-\centering \includegraphics[width=0.9\linewidth]{figs/fig-name.pdf}
-\caption{Lorem ipsum dolor sit amet,
-qui minim labore adipisicing minim sint cillum sint consectetur
-cupidatat.\texdtbf{lorem ipsum dolor sit amet}} \label{fig:lorem} \end{figure}
+    \centering \includegraphics[width=0.9\linewidth]{figs/fig-name.pdf}
+    \caption{Lorem ipsum dolor sit amet,
+    qui minim labore adipisicing minim sint cillum sint consectetur
+    cupidatat.\texdtbf{lorem ipsum dolor sit amet}} \label{fig:lorem}
+\end{figure}
diff --git a/src/tests/snapshots/fmtt__tests__format__gpt1-2.snap b/src/tests/snapshots/fmtt__tests__format__gpt1-2.snap
index a50a309..58df8e2 100644
--- a/src/tests/snapshots/fmtt__tests__format__gpt1-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__gpt1-2.snap
@@ -21,12 +21,12 @@ coordination for the arrival of the very important persons at 2 P.M.!
 Furthermore,
 it is completely acceptable if you find yourself out of
 the office during this period.
-Simultaneously,
-the Quality Assurance team is seeking your valuable input in relation to
-the user interface and user experience;
-your collaboration is essential before the end of the day.
-A brief touch-base is suggested before the close of business hours to
-synchronize efforts and align objectives for maximum efficiency?
+    Simultaneously,
+    the Quality Assurance team is seeking your valuable input in relation to
+    the user interface and user experience;
+    your collaboration is essential before the end of the day.
+    A brief touch-base is suggested before the close of business hours to
+    synchronize efforts and align objectives for maximum efficiency?
 
 Meanwhile,
 the Research and Development team is deeply immersed in the execution of
diff --git a/src/tests/snapshots/fmtt__tests__format__indented-2.snap b/src/tests/snapshots/fmtt__tests__format__indented-2.snap
index f37332a..e493a3b 100644
--- a/src/tests/snapshots/fmtt__tests__format__indented-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__indented-2.snap
@@ -7,8 +7,8 @@ Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
 Ut enim ad minim veniam,
 quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
 consequat.
-Duis aute irure dolor in reprehenderit in
-voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+    Duis aute irure dolor in reprehenderit in
+    voluptate velit esse cillum dolore eu fugiat nulla pariatur.
 
 Excepteur sint occaecat cupidatat non proident,
 sunt in culpa qui officia deserunt mollit anim id est laborum.
diff --git a/src/tests/snapshots/fmtt__tests__format__indented_and_allow_indented_paragraphs-2.snap b/src/tests/snapshots/fmtt__tests__format__indented_and_allow_indented_paragraphs-2.snap
index f37332a..e493a3b 100644
--- a/src/tests/snapshots/fmtt__tests__format__indented_and_allow_indented_paragraphs-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__indented_and_allow_indented_paragraphs-2.snap
@@ -7,8 +7,8 @@ Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
 Ut enim ad minim veniam,
 quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
 consequat.
-Duis aute irure dolor in reprehenderit in
-voluptate velit esse cillum dolore eu fugiat nulla pariatur.
+    Duis aute irure dolor in reprehenderit in
+    voluptate velit esse cillum dolore eu fugiat nulla pariatur.
 
 Excepteur sint occaecat cupidatat non proident,
 sunt in culpa qui officia deserunt mollit anim id est laborum.
diff --git a/src/tests/snapshots/fmtt__tests__format__latex_figure-2.snap b/src/tests/snapshots/fmtt__tests__format__latex_figure-2.snap
index ac26439..cecefd9 100644
--- a/src/tests/snapshots/fmtt__tests__format__latex_figure-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__latex_figure-2.snap
@@ -3,7 +3,8 @@ source: src/tests/format.rs
 expression: "&markdown_formatted"
 ---
 \begin{figure}
-\centering \includegraphics[width=0.9\linewidth]{figs/fig-name.pdf}
-\caption{Lorem ipsum dolor sit amet,
-qui minim labore adipisicing minim sint cillum sint consectetur
-cupidatat.\texdtbf{lorem ipsum dolor sit amet}} \label{fig:lorem} \end{figure}
+    \centering \includegraphics[width=0.9\linewidth]{figs/fig-name.pdf}
+    \caption{Lorem ipsum dolor sit amet,
+    qui minim labore adipisicing minim sint cillum sint consectetur
+    cupidatat.\texdtbf{lorem ipsum dolor sit amet}} \label{fig:lorem}
+\end{figure}
diff --git a/src/tests/snapshots/fmtt__tests__format__markdown_headers_separators-2.snap b/src/tests/snapshots/fmtt__tests__format__markdown_headers_separators-2.snap
index d811086..386d929 100644
--- a/src/tests/snapshots/fmtt__tests__format__markdown_headers_separators-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__markdown_headers_separators-2.snap
@@ -9,4 +9,5 @@ body
 content
 ===
 ###### Header 6
-####### This is just ordinary text, not a header.
+####### This is just ordinary text,
+    not a header.
diff --git a/src/tests/snapshots/fmtt__tests__format__markdown_mix-2.snap b/src/tests/snapshots/fmtt__tests__format__markdown_mix-2.snap
index 6583abf..06ce8c7 100644
--- a/src/tests/snapshots/fmtt__tests__format__markdown_mix-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__markdown_mix-2.snap
@@ -15,4 +15,5 @@ content
 2. This line is separate from the previous one.
 ===
 ###### Header 6
-####### This is just ordinary text, not a header.
+####### This is just ordinary text,
+    not a header.
diff --git a/src/tests/snapshots/fmtt__tests__format__markdown_ordered_list-2.snap b/src/tests/snapshots/fmtt__tests__format__markdown_ordered_list-2.snap
index 8b75f3f..8253376 100644
--- a/src/tests/snapshots/fmtt__tests__format__markdown_ordered_list-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__markdown_ordered_list-2.snap
@@ -4,4 +4,5 @@ expression: "&markdown_formatted"
 ---
 1. Lorem ipsum dolor sit amet
 2. consectetur adipiscing elit
-3. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua
+3. Sed do eiusmod tempor incididunt ut labore et
+    dolore magna aliqua
diff --git a/src/tests/snapshots/fmtt__tests__format__markdown_unordered_list-2.snap b/src/tests/snapshots/fmtt__tests__format__markdown_unordered_list-2.snap
index fda7f9f..aaf3e41 100644
--- a/src/tests/snapshots/fmtt__tests__format__markdown_unordered_list-2.snap
+++ b/src/tests/snapshots/fmtt__tests__format__markdown_unordered_list-2.snap
@@ -4,4 +4,5 @@ expression: "&markdown_formatted"
 ---
 - Lorem ipsum dolor sit amet
 - consectetur adipiscing elit
-* Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua
+* Sed do eiusmod tempor incididunt ut labore et
+    dolore magna aliqua